[3] The Derr structure was known in ancient times as 'The Temple of Ri'amsese-meryamun [Ramesses II] in the Domain of Re'[4] and was dedicated to the god Ra-Horakhty.
[5] Scholars disagree over its precise construction date: the French Egyptologist Nicolas Grimal states that it was built in the thirtieth year of Ramesses II, presumably to coincide with his first royal jubilee.
[8] According to Joyce Tyldesley, the Temple of Derr was built by Setau, who is known to have served as Ramesses' Viceroy of Kush or Nubia between Year 38 to 63 of this pharaoh's reign.
The temple of Derr is more elaborate than the speos of Beit el-Wali and "consisted of a sequence of two hypostyle halls (probably preceded by a forecourt and a pylon) leading to a triple sanctuary where a cult of statues of Ramesses II, Amon-Re, Ra-Horakhty and Ptah was celebrated.
"[10] When cleaned and restored in modern times, Derr proved to contain unusually bright and vivid relief decorations which contrasted sharply "with the more subdued color tones" from other Egyptian temples.