How did Borromini’s architecture influence Rococo architects?

The architecture of Francesco Borromini served as a significant source of inspiration for Rococo architects during the early 18th century.1

Borromini’s influence was particularly evident in his inventive use of fluid, active concave and convex masses and surfaces, as seen in his work on San Carlo alle Quattro Fontane. His late palace facade for the College of the Propagation of the Faith is specifically cited as a major source for Rococo designers.1

In the early 1700s, a renewed interest in Borromini’s work emerged in Rome, notably through the projects of architects such as Alessandro Specchi and Filippo Juvarra. This revival of Borromini’s complex, geometrically derived spatial concepts provided a foundation from which Italian Rococo architecture developed. While Rococo eventually refined the robust Baroque style into more graceful, ethereal interiors, it drew upon the earlier, more experimental spatial and structural freedom pioneered by Borromini.12