The modern Arab town is built on the ancient site of Ta-ynt-netert which means 'She of the Divine Pillar', which was once the capital of the 6th nome of Upper Egypt. The crocodile is recognized as the deity of the city and was also venerated as such in the other Egyptian cities, including Ombos.
Dendera is best known for the Ptolemaic Temple complex which contains the Temple of Hathor is one of the best preserved temples, in Egypt. However, this temple rests on the foundations of earlier buildings dating back at least as far as Khufu of the 4th dynasty.
adapted from Wikipedia
Dendera in Global Egyptian Museum