Santa Maria degli Angeli e dei Martiri was designed by Michelangelo and is the only Renaissance style church in Rome.

The temple, located very near Piazza della Repubblica, is one of the most surprising and unique in the city thanks to its ruined façade that contrasts with its vast and sensational interior.

The site where Santa Maria degli Angeli e dei Martiri was erected was where the Baths of Diocletian had been founded, an impressive demonstration of the glory of the Roman Empire until, in an intent to conquer Rome, the Goths cut the water supply of all the aqueducts of the city, and the baths had to be abandoned.

When neglected, the baths were taken over by bandits and courtesans until the Renaissance, when the grounds were bought by the French cardinal Jean du Bellay, who commissioned the construction of a beautiful villa and its gardens.

A Sicilian priest suggested building a church on the site of the Baths of Diocletian, in honour of all the Christian slaves who died while building the baths.

Several decades later, in 1560, the priest’s efforts were rewarded by Pope Pius IV who commissioned Michelangelo to transform the baths into a church.

The interior of the church is remarkable and completely unpredictable from looking at its bare façade. With an impressive dimension, the temple is beautifully decorated with vast frescoes on its walls and enormous coloured marble columns.

On the floor, visitors will be able to see the meridian solar line built by the astronomer and philosopher Francesco Bianchini in 1703. Bianchini’s meridian would tell when noon was throughout the year, the arrival of the solstices and equinox, as well as a calendar.

From Wiki:

The Fountain of the Naiads is located at the centre of the Piazza della Repubblica on the Viminal Hill. The fountain basin is circular and made of concrete. It includes a high central water jet and a number of lateral jets.^[2] At night, the fountain is illuminated by LED lights.^[3]

Around the basin are four bronze sculptures depicting naiads, who are water nymphs from classical mythology. They are the Nymph of the Lakes, who is shown together with a swan, the Nymph of the Rivers, who rests on a river monster, Oceanina—the Nymph of the Oceans—who is taming a wild horse representing waves, and the Nymph of Groundwater, who reclines on a dragon’s back. At the centre of the fountain, a sculpture of the sea god Glaucus symbolises the domination over natural forces. Glaucus is depicted as a naked and muscular man and the sculpture is reminiscent of the works of Gian Lorenzo Bernini. He holds a dolphin from whose mouth the central jet emerges.^[2]