Large domed temple on a high drum with Corinthian ...

Large domed temple on a high drum with Corinthian half columns in relation to the colonnaded square on the Corso. Prospectus with a pronaos with Corinthian portico on an open space on the Corso. Inside the space of the large circular room was originally broken through with chapels, now partially demolished, and completed by a presbytery with a square base and an apse