To the east of the propylaea stands the ruined Umayyad or Great Mosque, which was built from the stones of the temples using many styles of columns and capitals. Lebanon's only Umayyad ruin, outside Aanjar, it was built between the 7th and 8th centuries. There is an ablution fountain surrounded by four columns in the centre of the courtyard. On the right, immediately after the entrance, are rows of arched colonnades with Roman columns and capitals, clearly taken from the temple complex.
At the northwestern corner are the ruins of a great octagonal minaret on a square base.
