Santi Quattro Coronati
Often overlooked, Rome's medieval heritage is one of the largest in Italian cities. Basilicas dating from the Paleochristian age include Santa Maria Maggiore and San Paolo Fuori le Mura (the second largely rebuilt in the 19th century), both housing precious 4th century AD mosaics. Later notable medieval mosaic and fresco art can be also found in the churches of Santa Maria in Trastevere, Santi Quattro Coronati and Santa Prassede. Lay buildings include a number of towers, the largest being the Torre delle Milizie and the Torre dei Conti, both next the Roman Forum, and the huge staircase leading to the basilica of Santa Maria in Ara Coeli.