Trastevere, a medieval district of Rome west of the Tiber, is one of Rome’s most scenic quarters, but also contains some of its most beautiful works of art and architecture. The mosaics of the apse of Santa Maria in Trastevere (literally, the name means ‘across the Tevere’, that is, ‘across the Tiber’) date from the early 13th century, and are purported to be the work of Pietro Cavallini. In keeping with the church’s dedication, the central subject is the Coronation of the Virgin (see below).