Originally built on an island in the Nile, it was already semi-submerged following the building of the first Aswan Dam in 1900.
It had to be moved several times due to flooding on the Nile River.  
mnli hypothesis: It had to be moved several times due to flooding on the Nile River.   premise: Originally built on an island in the Nile, it was already semi-submerged following the building of the first Aswan Dam in 1900.