Great Colonnade at Apamea overhauled drainage system. Justinian's changes included erecting a monumental "tetrastylon" made up of four high columns with a meter-high capitals. The city, was however, later sacked by the Sasanians under Adarmahan. Great Colonnade at Apamea The Great Colonnade at Apamea was the main colonnaded avenue of the ancient city of Apamea in the Orontes River valley in northwestern Syria. It was built in the second century CE after Apamea's devastation in the 115 earthquake. The avenue, which runs for nearly , made up the city's north-south axis, or the "cardo maximus". The monumental colonnade is among the longest and most
Xystus (architectural term) of Jerusalem and Elis. "Xyst" is an alternative spelling for "xystus", and xystarch as the term for a superintendent of a xystus. In Latin, "xystum" is the accusative case of the nominative "xystus"; in modern architecture, xystum has a different meaning from xystus. Xystus (architectural term) Xystus was the Greek architectural term for the covered portico of the gymnasium, in which the exercises took place during the winter or in rainy weather, etc. The Romans applied the term to the garden walk in front of the porticoes, which was divided into flower beds with borders of box, and to a