Jordanian territory holds numerous treasures of mosaic floors belonging to three major eras. An example from the Hellenistic and Roman period (from the third century B.C. up to the fourth century A.D.) is the mosaic uncovered in Jerash, representing the Muses and poets. The Byzantine era (from the early decades of the fourth century up to the seventh century A.D.) brought forth an extraordinary explosion of mosaic production, notably for numerous basilicas. The most beautiful are those produced by the School of Madaba, such as the famous map of the Holy Land (sixth century), also the sanctuary on Mount Nebo, and the mosaics in the churches of the village Nebo. The scenes produced may be either religious, profane, or even mythological, such as the "Phaedra and Hippolytus" in the church dedicated to the Virgin in Madaba, which dates back to the early Omayyad period. The Omayyad period was followed by the Abbassid (636-750 and afterwards) with no real interruption. The works of both known and unknown mosaicists figure in the castles of Qasr al Hallabat, Qastal, Qusayr Amra, as well as in several churches, such as Saint Stephen's in Umm Al-Rasas.