Buddha was a human whose teachings formed the basis of the religion of Buddhism.
The Cave of the Thousand Buddhas was a cave located near Tun-Huang. (TV: "Five Hundred Eyes")
One of the prizes the First Doctor won in a backgammon game with Kublai Khan was the sacred tooth of Buddha. (TV: "Assassin at Peking")
According to Kurt, the Great Buddha said, "Life is suffering." (PROSE: Shakedown)