1803 in architecture

The year 1803 in architecture involved some significant architectural events and new buildings.

Buildings

 * The Raj Bhavan in Kolkata, West Bengal, India.
 * Holy Cross Church, Boston, Massachusetts, designed by Charles Bulfinch, dedicated.
 * St. John's Chapel (New York City), designed by John McComb, Jr. and his brother Isaac.
 * Rivington Unitarian Chapel in Lancashire, England.
 * Bob Church, Cluj, Transylvania.
 * Casa del Labrador, designed by Isidro González Velásquez, at the Royal Palace of Aranjuez in Spain is completed.
 * Nantwich Bridge in Cheshire, England, built by William Lightfoot.

Awards

 * Grand Prix de Rome, architecture: François-Narcisse Pagot.

Births

 * April 3 – David Bryce, Scottish architect (died 1876)
 * April 20 – Christian Hansen, Danish historicist architect (died 1883)
 * August 3 – Joseph Paxton, English gardener, architect and MP (died 1865)
 * October 16 – Robert Stephenson, English railway civil and mechanical engineer (died 1859)
 * November 29 – Gottfried Semper, German architect, art critic and professor of architecture (died 1879)

Deaths

 * date unknown – Ottone Calderari, Italian architect and writer (born 1730)