The Renaissance architecture style originated in 15th century Italy and was inspired by ancient Greek and Roman architecture. It emphasized symmetry, proportion, geometry and classical orders. Early architects like Brunelleschi and Alberti helped establish Renaissance styles which emphasized order and classical details. During the High Renaissance, architects like Bramante and Raphael further developed classical concepts. Mannerism introduced more imaginative rhythms as the Renaissance ideal of harmony gave way. The Renaissance style then spread across Europe in the 16th century as other regions gained economic and political power.