Santa Maria in Trastevere
The basic floor plan and wall structure of the Basilica of Santa Maria in Trastevere in Rome date to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I. The church has large areas of important mosaics from the late 13th century by Pietro Cavallini.
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