An earthquake strikes Antigua Guatemala, destroying much of the city's architecture.

The 1717 Guatemala earthquake struck colonial Guatemala on September 29 with an estimated moment magnitude of 7.4, and a Mercalli intensity of approximately IX (Violent). The earthquake essentially destroyed much of the architecture of Antigua Guatemala, which was the colonial capital of Central America at the time. Over 3,000 buildings were ruined including many temples and churches. Such was the effect of the disaster that the authorities considered moving the headquarters to a settlement which was less prone to natural disasters.

Antigua Guatemala, commonly known as Antigua or La Antigua, is a city in the central highlands of Guatemala. The city was the capital of the Captaincy General of Guatemala from 1543 through 1773, with much of its Baroque-influenced architecture and layout dating from that period. These characteristics had it designated as a UNESCO World Heritage Site in 1979. Antigua Guatemala serves as the capital of the homonymous municipality and the Sacatepéquez Department.

September 29 is the 272nd day of the year in the Gregorian calendar; 93 days remain until the end of the year.