The Fayum alphabet is an Ancient Greek abecedary inscribed on four copper plates, purportedly from Fayum, Egypt. It may preserve the earliest form of the Greek alphabet. It is the only known Greek abecedary which ends in the letter tau (Τ), as does the ancestral Phoenician alphabet; all other Greek abecedaries have at least the addition of non-Phoenician upsilon (Υ).