The year 1703 in architecture involved some significant architectural events and new buildings.

Events

• February 3 – Severe earthquake in L'Aquila damages many buildings.

Buildings and structures

Buildings completed

• May – Cabin of Peter the Great, built in three days by soldiers of the Semyonovsky Regiment.^[1]
• Cambrai Cathedral, France
• La Merced Cloister designed and constructed as part of a monastery in Mexico City by Juan de Herrera^[2]
• Stavenhagenhaus, Hamburg, Germany (dated from the arms above the main entrance door)
• Approximate date – Church of St. Anne, Kraków, Poland, designed by Tylman van Gameren, is completed

Births

• February – Robert Morris, English architect and writer on architecture (died 1754)
• October 13 – Andrea Belli, Maltese architect and businessman (died 1772)
• December 11 – Giovanni Antonio Medrano, Italian architect (died 1760)^[3]
• Approximate date – Sir Thomas Robinson, 1st Baronet, English nobleman and amateur architect (d. 1777)

Deaths

• February 16 – Lorenzo Gafà, Maltese Baroque architect and sculptor (born 1639)
• March 3 – Robert Hooke, English natural philosopher, architect and polymath (born 1635)
• December 27 – Thomas Cartwright, English architect (born c.1635)