Great Colonnade at Apamea columns display two main designs: a plain one, and the distinctive spiral-flutes. Archaeologist Jean Lassus argues that the former dates back to the Trajanic period, while the latter to that of Antoninus Pius. The colonnade's porticoes were paved with extensive mosaics along the full stretch of the colonnade. Under the Byzantine Emperor, Justinian I, several parts of the colonnade were restored. The street was narrowed to by adding a sidewalk on either side. Several stretches of the street had their Roman pavement replaced with a new pavement made of squared blocks of limestone. The new pavement also covered a completely
Great Colonnade at Apamea of the second century the city was completely rebuilt, starting with the Great Colonnade. The colonnade was aligned along the north-south axis, making up the city's "cardo maximus" under the Romans. Starting at the city's north gate, the colonnade ran in an uninterrupted straight line for almost to the south gate. The northern third of the colonnade's stretch is marked by a monumental votive column that stood opposite the baths. The southern third, at around , is marked by the intersection with the city's main east-west axis, or the "decumanus maximus". Two triple arches were built into the Great Colonnade