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
Great Colonnade at Palmyra March 2016. However, large parts of it are still intact. The colonnade consists of three sections that were built separately over the course of the second and third century CE. The western stretch of the colonnade is the oldest and started at the West Gate near the Funerary Temple. The eastern section stretched from the Monumental Arch in the center of the town to the entrance of the Temple of Bel. The middle section was built last to connect the two separate colonnades. It met the western stretch at the Great Tetrapylon, and the eastern stretch at the Monumental Arch.