No other city, not even Ravenna or Istanbul, has so many mosaics as Rome. The era of Mosaic art began at about the same time as the first Christian Basilicas were built and ended approximately in 1300, when Fresco painting became the mode. The selected churches in this itinerary reveal some the most impressive examples of Roman Mosaic art, which leads us into different epochs: to the 5th century in S. Pudenziana; to the 9th century in S. Prassede; to the mosaic of Jacopo Torriti in S. Maria Maggiore in the late 13th century.