Ancient Mesopotamia in the context of King of the Four Corners

Sumerian religion was the religion practiced by the people of Sumer, the first literate civilization found in recorded history and based in ancient Mesopotamia, and what is modern day Iraq. The Sumerians widely regarded their divinities as responsible for all matters pertaining to the natural and social orders of their society.

E-anna (Sumerian: 𒂍𒀭𒈾 É-AN.NA, "House of Heaven"), also referred to as the Temple of Inanna, was monumental ancient Sumerian temple complex in Uruk. Considered the "residence" of Inanna, it was among the most prominent and influential religious institutions of ancient Mesopotamia. Mentioned throughout the Epic of Gilgamesh and various other texts, the evolution of the gods to whom the temple was dedicated to over time is also the subject of scholarly study.

Sukkal (conventionally translated from Sumerian as "vizier") was a term which could denote both a type of official and a class of deities in ancient Mesopotamia. The historical sukkals were responsible for overseeing the execution of various commands of the kings and acted as diplomatic envoys and translators for foreign dignitaries. The deities referred to as sukkals fulfilled a similar role in mythology, acting as servants, advisors and envoys of the main gods of the Mesopotamian pantheon, such as Enlil or Inanna. The best known sukkal is the goddess Ninshubur. In art, they were depicted carrying staves, most likely understood as their attribute. They could function as intercessory deities, believed to mediate between worshipers and the major gods.

The office sukkal is also known from various areas to the west and east of Mesopotamia, including the Hurrian kingdom Arrapha, Syrian Alalakh and Mari and Elam under the rule of the Sukkalmah Dynasty, while the concept of divine sukkals was incorporated into Hurrian religion, in which major gods such as Kumarbi or Hebat commonly appear in company of their sukkals, similar to their Mesopotamian counterparts.

The First Dynasty of Ur (abbreviated Ur I) was a dynasty of rulers from the city of Ur in ancient Sumer who reigned c. 2600 – c. 2340 BC. Ur I is part of the Early Dynastic III period of ancient Mesopotamia. It was preceded by the earlier First Dynasty of Kish and the First Dynasty of Uruk.

In ancient Mesopotamia, the ašipu (also āšipu or mašmaššu) acted as priests. They were scholars and practitioners of diagnosis and treatment in the Tigris and Euphrates valley (now Iraq) around 3200 BC.

King of the Universe is a royal title that claims complete cosmological domination. As a historical title, King of the Universe was used intermittently by powerful monarchs in ancient Mesopotamia as a title of great prestige. Equivalent titles were sometimes later used in the Greco-Roman world as honorifics for powerful rulers. The title was also applied to various deities in ancient Mesopotamian, Greek, and Roman literature. As a religious title and honorific, King of the Universe has seen continued use as a title of God and certain other figures in the Abrahamic tradition.

The etymology of the Mesopotamian title, šar kiššatim, derives from the ancient Sumerian city of Kish. In ancient Sumer, Kish was seen as having primacy over other Mesopotamian cities and was in Sumerian legend the location where the kingship was lowered to from heaven after the legendary flood. The first ruler to use the title was Sargon of Akkad (r. c. 2334–2279 BC). The title continued to be used in a succession of later empires claiming symbolical descent from Sargon's Akkadian Empire. The last known ruler to assume the Mesopotamian title was the Seleucid king Antiochus I Soter (r. 281–261 BC).

King of the Four Corners of the World (Sumerian: lugal-an-ub-da-limmu-ba, Akkadian: šarru kibrat arbaim, šar kibrāti arbaʾi, or šar kibrāt erbetti), alternatively translated as King of the Four Quarters of the World, King of the Heaven's Four Corners or King of the Four Corners of the Universe and often shortened to simply King of the Four Corners, was a title of great prestige claimed by powerful monarchs in ancient Mesopotamia. Though the term "four corners of the world" does refer to specific geographical places within and near Mesopotamia itself, these places were (at the time the title was first used) thought to represent locations near the actual edges of the world and as such, the title should be interpreted as something equivalent to "King of all the known world", a claim to universal rule over the entire world and everything within it.

The title was first used by Naram-Sin of the Akkadian Empire in the 23rd century BC and was later used by the rulers of the Neo-Sumerian Empire, after which it fell into disuse. It was revived as a title by a number of Assyrian rulers, becoming especially prominent during the Neo-Assyrian Empire. The final ruler to claim the title was the first Persian Achaemenid king, Cyrus the Great, after his conquest of Babylon in 539 BC.

Assyrian continuity is the study of continuity between the modern Assyrian people, a recognised Semitic indigenous ethnic, religious, and linguistic minority in Western Asia (particularly in Iraq, northeast Syria, southeast Turkey, northwest Iran and in the Assyrian diaspora) and the people of Ancient Mesopotamia in general and ancient Assyria in particular. Assyrian continuity and Ancient Mesopotamian heritage is a key part of the identity of the modern Assyrian people. No archaeological, genetic, linguistic, anthropological, or written historical evidence exists of the original Assyrian and Mesopotamian population being exterminated, removed, bred out, or replaced in the aftermath of the fall of the Assyrian Empire. Modern contemporary scholarship "almost unilaterally" supports Assyrian continuity, recognizing the modern Assyrians (and Mandaeans) as the ethnic, historical, and genetic descendants of the East Assyrian-speaking population of Bronze Age and Iron Age Assyria specifically, and (alongside the Mandeans) of Mesopotamia in general, which were composed of both the old native Assyrian population and of neighboring settlers in the Assyrian heartland.

Due to an initial long-standing shortage of historical sources beyond the Bible and a handful of inaccurate and contradictory works by a few later classical European authors, many "Western" historians prior to the early 19th century believed Assyrians (and Babylonians) to have been completely annihilated, although this was never the view in the region of Mesopotamia itself or surrounding regions in West Asia, where the name of the land continued to be applied until the mid 7th century AD, and Assyrian people have continued to be referenced as such through to the present day.

King of the Lands (Akkadian: šar mātāti), also interpreted as just King of Lands or the more boastful King of All Lands was a title of great prestige claimed by powerful monarchs in ancient Mesopotamia. Introduced during the Neo-Assyrian Empire (911 BC–609 BC), the term mātāti explicitly refers to foreign (e.g. non-Assyrian) lands, often beyond the confines of Mesopotamia itself (in contrast to the word mātu which refers to the Assyrian land itself), suggesting that the Assyrian king had the right to govern foreign lands as well as his own.