The original function of the Colossi was to stand guard at the entrance to Amenhotep’s memorial temple (or mortuary temple): a massive cult centre built during the pharaoh’s lifetime, where he was worshipped as a god-on-earth both before and after his departure from this world. In its day, this temple complex was the largest and most opulent in Egypt. Covering a total of 35 hectares (86 acres), even later rivals such as Ramesses II's Ramesseum or Ramesses III's Medinet Habu were unable to match it in area; even the Temple of Karnak, as it stood in Amenhotep’s time, was smaller.
With the exception of the Colossi, however, very little remains today of Amenhotep’s temple. Standing on the edge of the Nile floodplain, successive annual inundations gnawed away at the foundations – a famous 1840s lithograph by David Roberts shows the Colossi surrounded by water – and it was not unknown for later rulers to dismantle, purloin, and reuse portions of their predecessors’ monuments.