The Propylaea consists of the four remaining pillars at the entrance to Baalbeck, all that is left of the series of columns that supported the portico or covered entryway to the temple complex. Inscribed at the base of these pillars is the phrase "For the safety and victories of our Lord Caracalla." It was under Caracalla's reign that the Roman version of the temple complex was completed. Baalbeck itself was incorporated into the Roman Empire in 64 A.D. by Pompey, then a general in the Roman army.