1755 in architecture

The year 1755 in architecture involved some significant events.

• November 1 – 1755 Lisbon earthquake in Portugal. Among many buildings destroyed is the Ópera do Tejo, designed by Giovanni Carlo Galli-Bibiena, opened only on March 31. The workforce completing the Mafra National Palace at Mafra is diverted to reconstruction work in Lisbon.

• Groote Kerk, Galle, Zeilan, is inaugurated
• Reformed Church of Shawangunk, New York, is inaugurated
• Puning Temple of Chengde, Hebei Province, China is begun
• St John the Evangelist's Church, Lancaster, England, probably designed by Henry Sephton, is completed
• Teatro San Benedetto in Venice is inaugurated
• Church of the Savior on Bolvany in Moscow is consecrated
• Nuruosmaniye Mosque in Istanbul, designed by Mustafa Ağa and Simeon Kalfa, is completed
• Yalı Mosque in İzmir is built
• Towers and domes of Pažaislis Monastery in Kaunas, Polish–Lithuanian Commonwealth, are added
• Hôtel Gayot in Strasbourg is completed
• Hatch Court, Somerset, England, designed by the amateur Thomas Prowse, is built at about this date

• January 29 (bapt.) – William Porden, English architect (died 1822)
• August 5 – James Playfair, Scottish Neoclassical architect (died 1794)
• September 3 – Johan Martin Quist, Danish architect (died 1818)
• Andreas Hallander, Danish architect (died 1828)
• Étienne Sulpice Hallet, French-born American architect (died 1825)

• Johan Cornelius Krieger, Danish architect (born 1683)