said to have been built on the site where S. Agnes was exposed after
her torture; the high altar in the subterranean chapel is said to
stand on the very spot. In another part is shown her prison, and where
she was beheaded and burned, the church occupying the side vaults of
the circus. The upper church contains eight columns of red Cortanella
marble; it is ornamented with stuccoes, statues, alto-reliefs, and
pictures. Behind the high altar is the sepulchral chapel of Princess
Mary Talbot, wife of Prince Doria, who died in 1857.
_A street on the left leads to the_