The most stunning remains are those from Madaba as a Byzantine
Archbishopric. In this incarnation the city became the center for vibrant
mosaic arts; excavations show that not only churches but also public buildings
and many private homes were decorated with intricate mosaic designs. 
Many of these have been
restored and are on display in the Madaba Archaeological Park, which also
houses the recently established Madaba School for Mosaic, a 3-year program
which has begun to revive this unique craft.
The most famous mosaic is found in the 6th Century St. George Church, where craftsmen created a mosaic map of the Mediterranean world.
Nearby Mt. Nebo,
overlooking the Dead Sea and (on a clear day) the spires of Jerusalem, is
credited as the site where Moses bade farewell to the tribes of Israel before
they crossed the Jordan River. The 4th Century church and monastic foundation
established by St. Helena have been excavated alongside the present 6th
Century church, which houses a fine array of decorative mosaics and carved
stone worship elements.
Wadi Siyagh, around Mt. Nebo, has a collection of several other early Byzantine church establishments with interesting architecture and mosaic.
