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| Pedro V | |
|---|---|
Portrait, 1861 | |
| King of Portugal | |
| Reign | 15 November 1853 – 11 November 1861 |
| Acclamation | 16 September 1855 |
| Predecessor | Maria II and Ferdinand II |
| Successor | Luís I |
| Regent | Ferdinand II (1853–1855) |
| Prime Ministers | |
| Born | 16 September 1837 Necessidades Palace, Lisbon |
| Died | 11 November 1861 (aged 24) Necessidades Palace, Lisbon |
| Burial | |
| Spouse | |
| House | Braganza |
| Father | Ferdinand II of Portugal |
| Mother | Maria II of Portugal |
| Religion | Roman Catholicism |
| Signature | |
Dom Pedro V (Anglicized: Peter V, Portuguese: Pedro de Alcântara Maria Fernando Miguel Rafael Gonzaga Xavier João António Leopoldo Vítor Francisco de Assis Júlio Amélio; 16 September 1837 – 11 November 1861), nicknamed "the Hopeful" (Portuguese: o Esperançoso), was King of Portugal from 1853 until his death in 1861.

As the eldest son of Queen Maria II and King Ferdinand II, Peter was a member of the House of Bragança. As heir apparent to the throne he was styled Prince Royal (Portuguese: Príncipe Real), and was also the 23rd Duke of Braganza (Duque de Bragança).

Peter was a conscientious and hard-working monarch who, under the guidance of his father, sought radical modernisation of the Portuguese state and infrastructure. Under his reign, roads, telegraphs, and railways were constructed and improvements in public health advanced. His popularity increased when, during the cholera outbreak of 1853–1856, he visited hospitals handing out gifts and comforting the sick.
Pedro V, along with his brothers Fernando and João and other royal family members, died of typhoid fever or cholera in 1861.
Pedro V founded Associação Naval de Lisboa on 30 April 1856, the oldest sports club in Portugal.

Peter married German Princess Stephanie of Hohenzollern-Sigmaringen, eldest daughter of Karl Anton, Prince of Hohenzollern-Sigmaringen, and Princess Josephine of Baden, by proxy in Berlin on 29 April 1858 and then in person in Lisbon on 18 May 1858.
Among the many wedding guests in Lisbon was Stephanie's brother Prince Karl Anton Joachim Zephyrinus Friedrich Meinrad von Hohenzollern, Commanding General of the VII Prussian Army Corps, accompanied by Major Reimar Constantin von Alvensleben.
It was a happy marriage until Queen Stephanie died a year later from diphtheria. As Peter and Stephanie's marriage was childless, the Portuguese throne passed to his brother Luís.
| Royal styles of King Peter V of Portugal | |
|---|---|
| Reference style | His Most Faithful Majesty |
| Spoken style | Your Most Faithful Majesty |
Pedro V's official styling as King of Portugal: By the Grace of God and by the Constitution of the Monarchy, Peter V, King of Portugal and the Algarves, of either side of the sea in Africa, Lord of Guinea and of Conquest, Navigation, and Commerce of Ethiopia, South Africa, Arabia, Persia and India, etc.
As heir apparent to the Portuguese crown, Peter held the following titles:
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