Monolatrism

Monolatrism or monolatry (Greek: μόνος (monos) = single, and λατρεία (latreia) = worship) is recognition of the existence of many gods but with the consistent worship of only one deity. The term was perhaps first used by Julius Wellhausen.

Monolatry is distinguished from monotheism, which asserts the existence of only one god, and henotheism, a religious system in which the believer worships one god without denying that others may worship different gods with equal validity.

Atenism

Amenhotep IV initially introduced Atenism in Year 5 of his reign (1348/1346 BCE), raising Aten, once a relatively obscure Egyptian Solar deity representing the disk of the sun, to the status of Supreme God in the Egyptian pantheon.

The fifth year of his reign is believed to mark the beginning of Amenhotep IV's construction of a new capital, Akhetaten (Horizon of the Aten), at the site known today as Amarna. Amenhotep IV officially changed his name to Akhenaten (Agreeable to Aten) as evidence of his new worship. In addition to constructing a new capital in honor of Aten, Akhenaten also oversaw the construction of some of the most massive temple complexes in ancient Egypt, including one at Karnak and one at Thebes, close to the old temple of Amun.