The 500 Brothers

Another motif Lockwood (77) raises in relation to the parables and the Buddhist tactic of "skillful leading by misleading" (upaya-kaushalya) is the appearance in Paul's First Epistle to the Corinthians (15:6-7) of 500 "brethren" who supposedly witnessed the resurrected Christ. This motif has been used by Christians as "proof" that Christ was a historical figure, about whom Paul and these hundreds of others clearly knew. However, according to Buddhist scholar Dr. Christian Lindtner, this "historical" episode represents yet another example of "pious fraud" and propaganda:

…The "more than 500 brethren," "most of whom are still alive," who are among those cited as eyewitnesses to Christ as raised from the dead, were originally the 500 Buddhist monks present at the death of the Buddha, as related in the MPS [Mahā-Parinirvāna-Sūtra ] (part of the MSV [Mūla-Sarvāstivāda-Vinaya]. So, here Paul reveals himself, if we know the original source, as being guilty of a pious fraud, indeed. (Lockwood, 77)

Source: Buddhism's Relation to Christianity