"The church started out, around the 14th century, as a chapel of the palace of the University of Rome. The University is called La Sapienza, and the church is devoted to St. Yves (patron saint of jurists), giving the church its name. Borromini was forced to adapt his design to the already existing palace. He chose a plan resembling a star of David, and merged the facade of the church with the courtyard of the palace. The dome, with its corkscrew lantern, is remarkable in its novelty. The complex rhythms of the interior have a dazzling geometry. It is a rational architecture - intricate to view, but on paper the overlap of a circle on two superimposed equilateral triangles creates a basis for a hexagonal array of chapels and altar in a centralized church. The undulations, both concave and convex of the interiors, create a jarring yet stunning appeal. The decoration is a mixture of novel organic (six-winged cherubic heads) and geometric (stars), more platonic than the contemporary gilded and plaster excesses of Gianlorenzo Bernini. Rising along the base of three of the dome’s pillars are the symbol of the papal Chigi family, the "six mountain beneath a star". The main artwork of the interior is the altarpiece by Pietro da Cortona, portraying St. Yves." (Churches of Rome Wiki, CC-BY-SA).