Which Roman monuments were built at Heliopolis, or Baalbek?

The archaeological complex at Heliopolis, known today as Baalbek, features several significant Roman monuments that reflect the architectural grandeur of the empire. Key structures at the site include:1

• Temple of Jupiter: Completed in the 2nd century CE, this massive sanctuary was built on a high terrace. It was accessed via a propylaea, a hexagonal forecourt, and a large rectangular main court surrounded by decorated exedrae. The temple itself featured 54 Corinthian columns.1
• Temple of Bacchus: A well-preserved Corinthian temple known for its peripheral colonnade and interior decorations, which suggest it was used for a salvational mystery religion.1
• Temple of Venus: A smaller, round temple located within the complex.1
• Additional Ruins: The site also contains traces of a temple dedicated to Hermes, remnants of the ancient town walls, and important Roman mosaics discovered in private homes.1

These monuments, which represent a peak of imperial architectural composition, were part of a broader effort to monumentalize the city during the Roman period.12