This is a 17th century oblong, Baroque church, completed by Borromini, that faces the Piazza Navona and Bernini's fountain. It commemorates the early Christian virgin, Agnes, at the place it is said she was lynched by a mob. This was originally the site of Domitian's circus, a stadium where competitions ("in agone") took place. The church's original central plan was a Greek cross with an octagonal crossing. Pope Innocent Xth (Pamphili) began the construction, situated next to his family's palace. It displays examples of the High Baroque in sculpture and paintings. The dome is derived from Michelangelo's design for St. Peter's dome, and is described by critics as having a solid harmony of proportions and perfect symmetry.