Amun, often merged with Ra as Amun-Ra, was regarded as king of the gods in Egypt’s New Kingdom.
Amun began as a local deity of Thebes and rose dramatically after Theban rulers reunited Egypt and founded the Eighteenth Dynasty. Because Thebes became the political center, its patron god gained national importance. Amun’s priests and temples, especially at Karnak, became extraordinarily powerful.
The fusion with Ra joined Amun’s hidden, creative character to Ra’s solar and royal authority. Amun-Ra therefore became a supreme creator and state deity, while Amun remained a distinct divine identity in Egyptian theology. The title is sometimes associated specifically with Amun-Ra, but “Amun” is the canonical answer to this wording.
A common mix-up is choosing Ra alone: Ra was the ancient sun god and a major royal deity, but the New Kingdom’s ascendant Theban god was Amun, whose combined form was Amun-Ra. Worship of Amun was temporarily suppressed during Akhenaten’s Atenist reforms, then restored under his successors.