https://en.m.wikipedia.org/wiki/Temple_of_Caesar
Caesar’s corpse was carried to the Roman Forum on an ivory couch and set up on the Rostra in a gilded shrine modelled on the Temple of Venus Genetrix, the goddess from whom the family of the Iulii claimed to have originated. Mark Antony delivered his famous speech followed by a public reading of Caesar’s will, while a mechanical device, positioned above the bier itself, rotated a wax image of Caesar so that people were able to clearly see the 23 wounds in all parts of the body and on the face. The crowd, moved by the words of Mark Antony, Caesar’s will, and the sight of the wax image, attempted but failed to carry the corpse to the Capitol to rest among the gods. In the end the corpse was placed on a funeral pile created near the Regia by making use of any wooden objects available in the Forum, such as wooden benches, and a great cremation fire lasted all the night long.
At this point, Caesar became a god, the first Roman since Romulus to become a god. A temple was built over the location of the cremation, and an altar erected on the very spot.
This is what remains of the altar:
Over 2,000 years later, offerings are still being made at this altar.