Italian Baroque architecture

The sacred architecture of the Baroque period had its beginnings in the Italian paradigm of the basilica with crossed dome and nave. One of the first Roman structures to break with the Mannerist conventions exemplified in the Gesù, was the church of Santa Susanna, designed by Carlo Maderno. The dynamic rhythm of columns and pilasters, central massing, and the protrusion and condensed central decoration add complexity to the structure. [Source]