Pelusium

Pelusium, the Greek name of an ancient Egyptian city, situated at the north-eastern angle of the Delta, and important as the key of Egypt on the Asiatic side. The eastern mouth of the Nile derived from it the epithet Pelusiac. Its identity with Sin of the Old Testament and the Greek Sais is doubtful. The Ostium Pelusiacum was choked up with sand as long ago as the 1st century B.C., and the whole district is a wilderness of sand and marshes.