|Covid-19|September 17 - Official opening of the Municipal Theatre of Santiago, Chile.
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.
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.
Zeldenrust, Zuidbarge smock mill, Netherlands.
Royal Gold Medal - Owen Jones.
Grand Prix de Rome, architecture: Joseph Heim.
American Institute of Architects (AIA) founded.
January 18 - William Lethaby, English Arts and Crafts architect and designer (died 1931)
May 28 - Charles Voysey, English Arts and Crafts designer and domestic architect (died 1941)
July 4 - John Campbell, Scottish architect (d. 1942)
August 12 - Marc Camoletti, Swiss architect (d. 1940)
September 1 - W. D. Caröe, English ecclesiastical architect (d. 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)
1857 in architecture Wikipedia
The year 1857 in architecture involved some significant events.