There are a large number of striking monuments located in Jerash: the Corinthium column, Hadrian's Arch, a circus/hippodrome, two immense temples (to Zeus and Artemis), the nearly unique oval Forum, which is surrounded by a fine colonnade, a long colonnaded street or cardo, two theatres (the Large South Theatre and smaller North Theatre), two baths, a scattering of small temples and an almost complete circuit of city walls. Most of these monuments were built by donations of the city's wealthy citizens.
From AD 350, a large Christian community lived in Jerash, and between AD 400-600, more than thirteen churches were built, many with superb mosaic floors. A cathedral was built in the fourth century. An ancient synagogue with detailed mosaics, including the story of Noah, was found beneath a church.
Today the ruins of Jerash are thoroughly excavated and excellently preserved.