1857 in architecture

The year 1857 in architecture involved some significant events.

• September 17 – Official opening of the Municipal Theatre of Santiago, Chile.
• American Institute of Architects (AIA) founded.

• Absecon Lighthouse in Atlantic City, New Jersey, United States, designed by George Meade.
• Ahırkapı Feneri (lighthouse), Istanbul, Turkey, designed by French engineers.
• Britannia Music Hall, Glasgow, Scotland, designed by Thomas Gildard and H. M. McFarlane.
• Old Town Hall, Silkeborg, Denmark, designed by H. C. Zeltner.
• Schwerin Palace, Mecklenburg, largely designed by Georg Adolf Demmler [de].
• Borujerdis House, Kashan, Persia, designed by Ustad Ali Maryam.
• Pont Saint-Michel, Paris, France, designed by Paul-Martin Gallocher de Lagalisserie and Paul Vaudrey.
• Basilica of Sainte-Clotilde, Paris, France, completed by Théodore Ballu to the design of Franz Christian Gau.
• All Saints' Church, Maidenhead, England, designed and with murals painted by George Edmund Street, with associated school.
• Museum, Trinity College Dublin, Ireland, designed by Thomas Deane and Benjamin Woodward.
• United States Custom House, designed by Ammi B. Young, opens in Providence, Rhode Island
• Zeldenrust, Zuidbarge smock mill, Netherlands.

• RIBA Royal Gold Medal – Owen Jones.
• Grand Prix de Rome, architecture: Joseph Heim.

• January 18 – William Lethaby, English Arts and Crafts architect and designer (died 1931)
• March 31 – John James Burnet, Scottish architect (died 1938)
• May 28 – Charles Voysey, English Arts and Crafts designer and domestic architect (died 1941)

• July 4 – John Campbell, Scottish architect (died 1942)
• August 12 – Marc Camoletti, Swiss architect (died 1940)
• September 1 – W. D. Caröe, English ecclesiastical architect (died 1938)

• March 19 – William Henry Playfair, English-born neoclassical architect working in New Town, Edinburgh (born 1790)
• December 9 – Thomas Oliver, English neoclassical architect working in Newcastle upon Tyne (born 1791)