You may be interested in this section of the FAQ.

With Zeitgeist specifically, the answer generally is that no, there's no truth to it. This lists some of them. A few illustrative examples:

1. Horus wasn't born of a virgin, as the movie states, but by Isis impregnating herself with Osiris' penis

• Horus didn't die, and wasn't resurrected
• Horus didn't have 12 disciples
• The film connects Jesus being the 'son' with 'sun' gods, but those two words don't even sound similar in the relevant languages