33, 666: the Market of Sertius (Marché de Sertius).
https://upload.wikimedia.org/wikipedia/commons/4/42/March%C3%A9_de_Sertius_de_Timgad.svg
It was built around the 3rd century AD and financed by a wealthy local citizen named Plotius Faustus Sertius and his wife, Valentina
It sits strategically along the Decumanus Maximus (the main east-west highway) right next to the iconic Arch of Trajan.
Compare to: Dendera facade + blog entries.