Санта-Мария-дельи-Анджели-э-деи-Мартири
Pope Clement XI had a famous sundial added in the church of Santa Maria degli Angeli e dei Martiri and had an obelisk erected in the Piazza della Rotonda in front of the Pantheon, and a port built on the Tiber River, the beautiful porto di Ripetta, demolished at the end of the 19th century.