Baroque and Rococo architecture originated in the late 16th century in Italy and spread across Europe. It was encouraged by the Catholic Church as a response to the Protestant Reformation. Key features included dramatic use of light and color, complex shapes, and blending of painting and architecture. Significant architects included Bernini, Borromini, and Maderno in Italy. Their works, such as St. Peter's Basilica and Sant'Andrea al Quirinale church, featured bold domes, colonnades, and elaborate ornamentation. Rococo architecture was a late Baroque style using more simplified forms and illusionistic painting. The lecture provided details on the origins and characteristics of Baroque and Rococo architecture.