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 Palmyra in a northwest-southeast direction towards the "propylaea" of the Temple of Bel. Work on the colonnade started after the completion of the "propylaea" in 175 CE and continued through the beginning of the third-century CE. This section is the widest of the Great Colonnade with a uniform width of for the main street and for the sidewalks. A corner of the "temenos" of the Temple of Nebu was demolished to allow the colonnade an uninterrupted line of sight towards the Monumental Arch from the west and a wider access to the section leading to the Temple of Bel. A "nymphaeum"