The Temple of Bacchus is characterized by being one of the best preserved Roman structures, and the most creative inscription and decoration at all. Performing religious rites specific to certain sects, and these rites and worship centered on the young god of Baalbek known as Bacchus, who was supervising the growth of plants and flocks, and the temple and the tower adjacent to it are still known today as the House of Happiness, and it is located to the western side. From the temple are the ruins of a mosque from the Ayyubid period known as Ibrahim Mosque, the garrison of Baalbek at that time gathered for prayer.