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A synagogue or synagog, 'Beit Kneset'—"house of gathering" in Hebrew, also called a shul (meaning school in Yiddish) or a temple, is a place of worship for Jews or Samaritans.
It serves as a house of prayer. It includes a main sanctuary with the Torah ark where the Torah scrolls are kept (called a Holy Closet aron qodesh (Hebrew: אָרוֹן קׄדֶש) by Ashkenazi Jews and a hekhal (היכל) by Sephardic Jews), and a stage called bema in front of it as well as raised galleries for female worshipers. Synagogues have religious services or ceremonies such as Daily prayers, Shabbat prayers (Saturday) weddings, bar and bat mitzvahs. Synagogues often also contain study rooms, social halls, administrative and charitable offices, classrooms for religious and Hebrew studies, and spaces for community gatherings. They frequently display commemorative, historic, or modern artwork alongside items of Jewish historical significance or exhibits about the synagogue itself.
Synagogues are buildings used for Jewish prayer, study, assembly, and reading of the Torah. The Torah (Pentateuch or Five Books of Moses) is traditionally read in its entirety over a period of a year in weekly portions during services, or in some synagogues on a triennial cycle. However, the edifice of a synagogue as such is not essential for holding Jewish worship. Halakha (Jewish law from the Mishnah—the "Oral Torah") states that communal Jewish worship can be carried out wherever a minyan, a group of at least 10 Jewish adults, is assembled, often (but not necessarily) led by a rabbi. This minyan is the essence of Jewish communal worship, which can also be conducted alone or with fewer than ten people, but that excludes certain prayers as well as communal Torah reading. In terms of its specific ritual and liturgical functions, the synagogue does not replace the long-destroyed Temple in Jerusalem.
Any Jew or group of Jews can build a synagogue. Synagogues have been constructed by ancient Jewish leaders, wealthy patrons, and as part of a wide range of human institutions, including secular educational institutions, governments, and hotels. They have been built by the entire Jewish community living in a particular village or region, or by sub-groups of Jewish people organized by occupation, tradition/background (e.g., the Sephardic, Yemenite, Romaniote or Persian Jews of a town), style of religious observance (e.g., Orthodox or Reform synagogues), or by the followers of a particular rabbi, such as the shtiebelekh (Yiddish: שטיבעלעך, romanized: shtibelekh, singular שטיבל shtibl) of Hasidic Judaism.
The Hebrew term is bet knesset (בית כנסת) or "house of assembly". The Koine Greek-derived word synagogue (συναγωγή) also means "assembly" and is commonly used in English, with its earliest mention in the 1st century Theodotos inscription in Jerusalem. Ashkenazi Jews have traditionally used the Yiddish term shul (from the Greek schola, which is also the source of the English "school") in everyday speech, and many continue to do so in English.
Sephardi Jews and Romaniote Jews generally use the term kal (from the Hebrew qahal "community"). Spanish and Portuguese Jews call the synagogue an esnoga and Portuguese Jews may call it a sinagoga. Persian Jews and some Karaite Jews also use the term kenesa, which is derived from Aramaic, and some Mizrahi Jews use kenis or qnis, the Arabic word for a synagogue, or ṣla, the Arabic word for prayer.
The origins of the synagogue are obscure.: 21 Scholarly opinion has been divided among several views. The first holds that the synagogue arose after Josiah's reform of 622/1 BCE banned sacrifice outside the First Temple in Jerusalem. The second, long the most widely held, holds that it was created during the Babylonian exile as an alternative form of worship after the Temple's destruction in 587/6 BCE. The third view traces it to Ezra's public reading of the Torah in 5th-century BCE Jerusalem as narrated in the biblical Book of Nehemiah.: 24–26 Other scholars have proposed an origin among diaspora communities in Hellenistic Egypt.: 26–28
Historian and archaeologist Lee I. Levine argues that the synagogue developed gradually between the 5th and 1st centuries BCE.: 29, 36–37 In biblical times, communal life centered on the city gate and the open space beside it, which served as a marketplace, a courtroom, a venue for delivering prophecies, a forum for public assemblies, and sometimes a site of worship.: 30–32 Archaeological evidence, mainly from pagan coastal cities, shows that in the Hellenistic period gates became simple passageways between towers. In Levin's view, the activities once held there moved into what became known as the synagogue.: 34–35 Levine suggests the institution emerged more or less simultaneously in Judea, where the old gate setting was disappearing, and in the diaspora, where Jews could not use the gates of pagan cities for communal life.: 44
The earliest firm evidence for the synagogue comes from the Second Temple period, and more specifically, from 3rd-century BCE Ptolemaic Egypt, where several inscriptions and papyri in Koine Greek mention a προσευχή, proseukhē, 'house of prayer' (plural: προσευχαί, proseukhái). The oldest dedications date to the reign of Ptolemy III Euergetes, king of Egypt between 246 and 221 BCE.: 21, 23, 83 Egyptian Jews commonly dedicated their prayer houses on behalf of the reigning king and queen.: 83, 85 No synagogue building has yet been found in Egypt.: 82 The oldest known synagogue building is the Delos Synagogue on the Aegean island of Delos, which was in use at least from the first century BCE. It is the only pre-70 diaspora structure widely identified as a synagogue.: 21, 107
Synagogues are attested in the Land of Israel after they appeared in the diaspora, with the earliest known example dating from the late 2nd century BCE. Earlier Jewish and pagan writings are almost silent about synagogues in this region. Ben Sira and the books of Maccabees do not mention it, and where synagōgē appears in 1 Maccabees, it refers to a group of people, not a building.: 28, 41–42 For a long time, few sites supported the existence of synagogue buildings in the regions of Judea and Galilee before the destruction of Jerusalem in 70 CE. In the Herodian palace-fort hilltop complexes of Masada and Herodium, the synagogues were not built as such but were adapted by rebels during the First Jewish Revolt and the Bar Kokhba Revolt.: 9–10 The first site to become generally accepted as a purpose-built synagogue was the Gamla Synagogue in Gamla, an ancient Jewish town in the Golan Heights, with proposed dates ranging from the mid-first century BCE to roughly the turn of the era.: 9–10
Excavation has since widened the picture. Proposed Second Temple-era synagogues now include Khirbet Badd 'Isa (in Modi'in Illit), Umm el-'Umdan (in Modi'in), where a Hasmonean-period building was succeeded by a Herodian one, and the Migdal Synagogue (in ancient Magdala) with its two phases.: 10 Their typical layout is an open hall lined with benches, with a roof carried on interior colonnades.: 10–11 Other proposals remain disputed, including the public structure at Horvat 'Ethri and small rural sites such as Horvat Diab and Tel Rekhesh. The Theodotus inscription, dated to between the first century BCE and the first century CE, points to a synagogue serving a Greek-speaking community in Jerusalem.: 10–11
By the first century CE, the synagogue was the central communal institution of Jewish communities in both Judaea and the diaspora. Large cities such as Jerusalem, Alexandria, and Rome had several, and smaller Jewish communities throughout the Roman Empire probably had at least one each, so it is probable that hundreds, perhaps thousands, existed.: 22, 82 Philo and Josephus mention lavishly adorned synagogues in Alexandria and in Antioch, respectively.
Diaspora synagogues varied in name and practice. They went by many names in Greek, including proseukhē, synagōgē, hieron, sabbateion, and didaskaleion. This diversity arose partly because the founding communities had no model to follow, and partly because each community adopted patterns from its surrounding culture, in organization as well as in architecture.: 128–129 Most used Greek in inscriptions and official titles, and honored benefactors in Greco-Roman fashion.: 129 Yet the institution remained distinctively Jewish, centered on the reading of scripture.: 131, 133
In both Judaea and the diaspora, the main religious activity was public Torah reading.: 38, 131 In the diaspora, at least, this took place above all on Shabbat, Judaism's weekly day of rest.: 38–39, 116, 131 In the diaspora, synagogues also safeguarded sacred books and money collected for the Jerusalem Temple, and many had halls for communal meals.: 90, 115 The Book of Acts describes a Shabbat service at Antioch of Pisidia in which readings from the Torah and Nevi'im were followed by an invitation to address the congregation.: 117–118 A synagogue could also serve as a court, school, hostel, or venue for political meetings.: 29 Roman decrees preserved by Josephus upheld the Jews' right to assemble, collect funds, and dine together, even in Rome, where other religious associations were banned.: 106, 112
Levine rejects the once-common view of the synagogue as a rival to the Jerusalem Temple or as a creation of the Pharisaic movement. In Judea, it held no special sanctity during the Second Temple period. Several sources show priests prominent in its affairs, and no evidence connects the early synagogue with the Pharisees.: 40–41, 44



Following the destruction of the Temple, the synagogue became the focal point of Jewish worship and communal life. Lester L. Grabbe writes: "The rise of the synagogue was a fortuitous but vital development which paved the way for a post-temple Judaism which became necessary after 70 [...] Synagogues were not planned as a substitute for the temple but they were a useful vehicle to make the transition." Over time, prayers, rituals, and customs once performed in the Temple were adapted for synagogue use. Traditional forms of synagogal worship, including sermons and the reading of scripture, were preserved, while new forms of worship, such as piyyut and organized prayer, developed. Rabbinic instruction, however, maintained that certain practices should remain exclusive to the Temple. The Mishnah directed prayers toward Jerusalem, and most synagogues face the Temple site rather than mirroring its orientation, establishing them as extensions of its sanctity, not replicas.
During Late antiquity (third to seventh century CE), literary sources attest to the existence of a large number of synagogues across the Roman-Byzantine and Sasanian Empires. Archaeological evidence indicates the presence of synagogues in at least thirteen places across the diaspora, spanning from Dura-Europos in Syria to Elche in Hispania (modern-day Spain). An especially sizable and monumental synagogue dating from this period is the Sardis Synagogue. Additionally, many inscriptions pertaining to synagogues and their officials have been discovered.
In the Land of Israel, late antiquity witnessed a significant increase in synagogue construction, in Galilee and Golan in the north and the southern hills of Judea, in the south. Each synagogue was constructed according to the means and religious customs of the local community. Notable examples include Capernaum, Bar'am, Beth Alpha, Maoz Haim, Meroth and Nabratein in the north, and Eshtemoa, Susya, Anim, and Maon in the south.
There is epigraphic and archaeological evidence that a synagogue dating to the third century existed to serve a significant Jewish community in Volubilis, capital of the former Kingdom of Mauretania, in what is now Morocco.

Rabbi and philosopher Maimonides (1138–1204) described the various customs in his day with respect to local synagogues:
Synagogues and houses of study must be treated with respect. They are swept and sprinkled [with water] to lay the dust. In Spain and the Maghreb, in Babylonia and in the Holy Land, it is customary to kindle lamps in the synagogues and to spread mats on the floor upon which the worshippers sit. In the lands of Edom (Christendom), they sit in synagogues upon chairs [or benches].

The Samaritan house of worship is also called a synagogue. During the third and second centuries BCE, the Hellenistic period, the Greek word used in the Diaspora by Samaritans and Jews was the same, proseukhē Koine Greek: προσευχή, lit. 'place of prayer', plural προσευχαί prosukhái); a third or fourth century inscription uses a similar term, εὑκτήριον euktērion.
The oldest Samaritan synagogue discovered so far is from Delos in the Aegean Islands, with an inscription dated between 250 and 175 BCE, while most Samaritan synagogues excavated in the wider Land of Israel and ancient Samaria in particular, were built in the fourth to seventh centuries at the very end of the Roman Empire and throughout the Byzantine period.
The elements which distinguish Samaritan synagogues from contemporary Jewish ones are:
Ancient Samaritan synagogues are mentioned by literary sources or have been found by archaeologists in the Diaspora, in the wider Holy Land, and specifically in Samaria.
In the New Testament, the word appears 56 times, mostly in the Synoptic Gospels, but also in the Gospel of John (John 9:22; 18:20) and the Book of Revelation (Rev. 2:9; 3:9). It is used in the sense of 'assembly' in the Epistle of James (James 2:2). Alternatively, the epistle of James (in Greek, clearly Ἰάκωβος or יעקב, anglicized to Jacob) refers to a place of assembly that was indeed Jewish, with Jacob ben Joseph perhaps an elder there. The specific word in James (Jacob) 2:2 could easily be rendered "synagogue", from the Greek συναγωγὴν.
In 1995, Howard Clark Kee argued that synagogues were not a developed feature of Jewish life prior to the First Jewish–Roman War (66-73 CE) and that the mentions of synagogues in the New Testament, including Jesus's visitations of synagogues in various Jewish settlements in Israel, were anachronistic. However, archaeologists have discovered first-century synagogues, and Chris Keith and Anders Runesson find it almost certain that the historical Jesus preached in synagogues in Galilee.
During the first Christian centuries, Jewish Christians are hypothesized to have used houses of worship known in academic literature as synagogue-churches. Scholars have claimed to have identified such houses of worship of the Jews who had accepted Jesus as the Messiah in Jerusalem and Nazareth.
There is no set blueprint for synagogues and the architectural shapes and interior designs of synagogues vary greatly. In fact, the influence from other local religious buildings can often be seen in synagogue arches, domes and towers.
Historically, synagogues were built in the prevailing architectural style of their time and place. Thus, the synagogue in Kaifeng, China, looked very much like Chinese temples of that region and era, with its outer wall and open garden in which several buildings were arranged. The styles of the earliest synagogues resembled the temples of other cults of the Eastern Roman Empire. The surviving synagogues of medieval Spain are embellished with mudéjar plasterwork. The surviving medieval synagogues in Budapest and Prague are typical Gothic structures.
With the emancipation of Jews in Western European countries in the 19th century—which not only enabled Jews to enter fields of enterprise from which they were formerly barred, but gave them the right to build synagogues without needing special permissions—synagogue architecture blossomed. Large Jewish communities wished to show not only their wealth but also their newly acquired status as citizens by constructing magnificent synagogues. These were built across Western Europe and in the United States in all of the historicist or revival styles then in fashion. Thus there were Neoclassical, Renaissance Revival architecture, Neo-Byzantine, Romanesque Revival, Moorish Revival, Gothic Revival, and Greek Revival. There are Egyptian Revival synagogues and even one Mayan Revival synagogue. In the 19th-century and early-20th-century heyday of historicist architecture, however, most historicist synagogues, even the most magnificent ones, did not attempt a pure style, or even any particular style, and are best described as eclectic.
In the post-war era, synagogue architecture abandoned historicist styles for modernism.

All synagogues contain a bimah (Hebrew: בּימה, platform or pulpit; plural bimot), a large, raised, reader's platform, where the Torah scroll is placed to be read. In Sephardi synagogues and traditional Ashkenazi synagogues, it is also used as the prayer leader's reading desk.
The term is post-biblical Hebrew, and almost certainly derived from the Ancient Greek word for a raised platform, bema (βῆμα). A link to the Biblical Hebrew bama (בּמה), 'high place' has been suggested. It is also known as the almemar or almemor among some Ashkenazi Jews, from Arabic minbar "pulpit". Among Sephardic Jews, it is known as a tēḇāh (Hebrew: תֵּבָה, box or case) or migdal-etz ('tower of wood').
In Orthodox Judaism, the bimah is located in the center of the synagogue, separate from the Torah ark. In other branches of Judaism, the bimah and the ark are joined together.
The bimah is raised to demonstrate the importance of the Torah reader, and to make it easier to hear the recitation of the Torah. In antiquity, the bimah was made of stone, but in modern times it is usually a rectangular wooden platform approached by steps. Over time, it became a standard fixture in synagogues, where the weekly Torah portion and haftara are read. The platform is typically elevated by two or three steps, as in the ancient Temple. It will generally have a railing, which is a halakhic safety regulation for platforms more than ten handbreadths high, between 83 and 127 centimetres (2.72 and 4.17 ft). A lower bimah (even one step) will sometimes have a railing as a practical measure to prevent someone from stepping off inadvertently.
At the celebration of Shavuot, when synagogues are decorated with flowers, many synagogues have special arches that they place over the bima and adorn with floral displays.
In Ashkenazi synagogues, the Torah was read on a reader's table located in the center of the room, while the leader of the prayer service, the hazzan, stood at a lectern or table in the front, facing the Ark. In Sephardic synagogues, the table for reading the Torah (reading dais) was commonly placed at the opposite side of the room from the Torah Ark, leaving the center of the floor empty for the use of a ceremonial procession carrying the Torah between the Ark and the reading table. Most contemporary synagogues feature a lectern for the rabbi.
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The Torah Ark, called in Hebrew ארון קודש Aron Kodesh or 'holy chest' , and alternatively called the heikhal—היכל or 'temple' by Sephardic Jews, is a cabinet in which the Torah scrolls are kept.

The ark in a synagogue is almost always positioned in such a way such that those who face it are facing towards Jerusalem. Thus, sanctuary seating plans in the Western world generally face east, while those east of Israel face west. Sanctuaries in Israel face towards Jerusalem and in Jerusalem towards the Temple Mount. Occasionally, synagogues face other directions for structural reasons; in such cases, some individuals might turn to face Jerusalem when standing for prayers, but the congregation as a whole does not.
The Ark is reminiscent of the Ark of the Covenant, which held the tablets inscribed with the Ten Commandments. This is the holiest spot in a synagogue, also reminiscent of the Holy of Holies. The Ark is often closed with an ornate curtain, the parochet פרוכת, which hangs outside or inside the ark doors.

Other traditional features include a continually lit lamp or lantern, usually electric in contemporary synagogues, called the ner tamid (נר תמיד), the "Eternal Light", used as a way to honor the Divine Presence.

A synagogue may be decorated with artwork, but in the Rabbinic and Orthodox tradition, three-dimensional sculptures and depictions of the human body are not allowed as these are considered akin to idolatry.
Originally, synagogues were made devoid of much furniture, the Jewish congregants in Spain, the Maghreb (North Africa), Babylonia, the Land of Israel and Yemen having a custom to sit upon the floor, which had been strewn with mats and cushions, rather than upon chairs or benches. In other European towns and cities, however, Jewish congregants would sit upon chairs and benches. Today, the custom has spread in all places to sit upon chairs and benches.[citation needed]
In an Ashkenazi synagogue, all seats most often face the Torah Ark, meaning that congregants sit in rows. In a Sephardic synagogue, seats are usually arranged around the perimeter of the sanctuary, but during the main prayer, Amidah, everyone face the Ark.[citation needed]
Many current synagogues have an elaborate chair named for the prophet Elijah, which is only sat upon during the ceremony of brit milah.
In ancient synagogues, a special chair placed on the wall facing Jerusalem and next to the Torah Shrine was reserved for the prominent members of the congregation and for important guests. Such a stone-carved and inscribed seat was discovered at archaeological excavations in the synagogue at Chorazin in Galilee and dates from the 4th–6th century; another one was discovered at the Delos Synagogue, complete with a footstool.
In Yemen, the Jewish custom was to remove one's shoes immediately prior to entering the synagogue, a custom that had been observed by Jews in other places in earlier times. The same practice of removing one's shoes before entering the synagogue was also largely observed among Jews in Morocco in the early 20th century. On the island of Djerba in Tunisia, Jews still remove their shoes when entering a synagogue. The custom of removing one's shoes is no longer practiced in Israel, the United Kingdom, or the United States, and which custom, as in former times, was dependent upon whether or not the wearer considered it a thing of contempt to stand before God while wearing shoes. In Christian countries, where it was thought not offensive to stand before a king while wearing shoes, it was likewise permitted to do so in a house of prayer. However, in Karaite Judaism, the custom of removing one's shoes prior to entering a synagogue is still observed worldwide.
In Orthodox synagogues, men and women do not sit together. The synagogue features a partition (mechitza) dividing the men's and women's seating areas, or a separate women's section located on a balcony.

The German–Jewish Reform movement, which arose in the early 19th century, made many changes to the traditional look of the synagogue, keeping with its desire to simultaneously stay Jewish yet be accepted by the surrounding culture.
The first Reform synagogue, which opened in Hamburg in 1811, introduced changes that made the synagogue look more like a church. These included: the installation of an organ to accompany the prayers (even on Shabbat, when musical instruments are proscribed by halakha), a choir to accompany the hazzan, and vestments for the synagogue rabbi to wear.
In following decades, the central reader's table, the Bimah, was moved to the front of the Reform sanctuary—previously unheard-of in Orthodox synagogues.
Gender separation was also removed.
The Conservative/Masorti movement, which arose in the late 19th century, had its own changes to the synagogue. While most authorities were uncomfortable with the inclusion of organs in the synagogue. they found merit in the removal of gender separation and other Reform movement alterations.
Synagogues often take on a broader role in modern Jewish communities and may include additional facilities such as a catering hall, kosher kitchen, religious school, library, day care center and a smaller chapel for daily services.
Since many Orthodox and some non-Orthodox Jews prefer to collect a minyan (a quorum of ten adults) rather than pray alone, they commonly assemble at pre-arranged times in offices, living rooms, or other spaces when these are more convenient than formal synagogue buildings. A room or building that is used this way can become a dedicated small synagogue or prayer room. Among Ashkenazi Jews they are traditionally called shtiebel (שטיבל, pl. shtiebelekh or shtiebels, Yiddish for "little house"), and are found in Orthodox communities worldwide.
Another type of communal prayer group, favored by some contemporary Jews, is the chavurah (חבורה, pl. chavurot, חבורות), or prayer fellowship. These groups meet at a regular place and time, either in a private home or in a synagogue or other institutional space. In antiquity, the Pharisees lived near each other in chavurot and dined together to ensure that none of the food was unfit for consumption.



Studies undertaken at the Hebrew University of Jerusalem have identified 3,347 historic synagogues in Europe. Just over a quarter of these have been assessed by the Foundation for Jewish Heritage as buildings at risk because of their building condition.






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