Michelangelo was famous as Renaissance sculpture, painter, architect, poet, and engineer. His most famous architectural achievement included what is still one of the most famous domed structures in the world. What is this famous structure called

Michelangelo's most famous architectural achievement is St. Peter's Basilica in Vatican City in Italy. St. Peter's Basilica is one of the world's most famous domed structures. Michelangelo's contribution to this structure is considered to be the greatest because his plans were continued even after his death.