During Egypt’s Old Kingdom, cities such as Pithon and Rowaty (later known as Avaris then Pi-Rameses) were built on the Pelusiac distributary of the Nile, the furthest eastward distributary, but later as the Ice Age was ending in the days of the Exodus, the Pelusiac distributary began to dry-up thus Tanis was built on the Tanitic distributary the next-one-over to the west. Such was true of the ancient Egyptian building on the furthest westward and a now dried-up distributary the Canopic (including Menouthis submerged since the end of the Ice Age in Aboukir Bay), seven distributaries during the Old Kingdom now only two.