Kudurru in the context of "Suen"

Sin (/ˈsiːn/) or Suen (Akkadian: 𒀭𒂗𒍪, EN.ZU) also known as Nanna (Sumerian: 𒀭𒋀𒆠 ŠEŠ.KI, NANNA) is the Mesopotamian god representing the moon. While these two names originate in two different languages, respectively Akkadian and Sumerian, they were already used interchangeably to refer to one deity in the Early Dynastic period. They were sometimes combined into the double name Nanna-Suen. A third well attested name is Dilimbabbar (𒀭𒀸𒁽𒌓). Additionally, the name of the moon god could be represented by logograms reflecting his lunar character, such as 30 (𒀭𒌍), referring to days in the lunar month or U₄.SAKAR (𒀭𒌓𒊬), derived from a term referring to the crescent. In addition to his astral role, Sin was also closely associated with cattle herding. Furthermore, there is some evidence that he could serve as a judge of the dead in the underworld. A distinct tradition in which he was regarded either as a god of equal status as the usual heads of the Mesopotamian pantheon, Enlil and Anu, or as a king of the gods in his own right, is also attested, though it only had limited recognition. In Mesopotamian art, his symbol was the crescent. When depicted anthropomorphically, he typically either wore headwear decorated with it or held a staff topped with it, though on kudurru the crescent alone serves as a representation of him. He was also associated with boats.

The goddess Ningal was regarded as Sin's wife. Their best attested children are Inanna (Ishtar) and Utu (Shamash), though other deities, for example Ningublaga or Numushda, could be regarded as members of their family too. Sin was also believed to have an attendant deity (sukkal), Alammuš, and various courtiers, such as Nineigara, Ninurima and Nimintabba. He was also associated with other lunar gods, such as Hurrian Kušuḫ or Ugaritic Yarikh.

Babylonian astronomy collated earlier observations and divinations into sets of Babylonian star catalogues, during and after the Kassite rule over Babylonia. These star catalogues, written in cuneiform script, contained lists of constellations, individual stars, and planets. The constellations were probably collected from various other sources. The earliest catalogue, Three Stars Each, mentions stars of Akkad, of Amurru, of Elam and others.Various sources have theorized a Sumerian origin for these Babylonian constellations, but an Elamite origin has also been proposed. A connection to the star symbology of Kassite kudurru border stones has also been claimed, but whether such kudurrus really represented constellations and astronomical information aside from the use of the symbols remains unclear.

Star catalogues after Three Stars Each include the MUL.APIN list named after the first Babylonian constellation APIN, "the Plough", which is the current Triangulum constellation plus Gamma Andromedae. It lists, among others, 17 or 18 constellations in the zodiac. Later catalogues reduce the zodiacal set of constellations to 12, which were borrowed by the Egyptians and the Greeks, still surviving among the modern constellations.

Gula (Sumerian: "the great") was a Mesopotamian goddess of medicine, portrayed as a divine physician and midwife. Over the course of the second and first millennia BCE, she became one of the main deities of the Mesopotamian pantheon, and eventually started to be viewed as the second highest ranked goddess after Ishtar. She was associated with dogs, and could be depicted alongside these animals, for example on kudurru (inscribed boundary stones), and receive figurines representing them as votive offerings.

While Gula was initially regarded as unmarried, in the Kassite period she came to be associated with Ninurta. In Babylon his role could also be fulfilled by Mandanu, while the god list An = Anum links Gula with Pabilsag and Abu. The circle of deities closely associated with her also included Damu and Gunura, who eventually started to be regarded as her children, as well as her sukkal (divine attendant) Urmašum, who might have been imagined as a dog-like being. Through various syncretic processes she could be equated with other goddesses of similar character, including Ninisina, Ninkarrak, Nintinugga, Bau and Meme, though all of them were originally separate, and with the exception of the last of them did not entirely cease to be worshiped separately, even though their individual cults did decline. A well known composition dedicated to describing Gula's syncretic associations is the Gula Hymn of Bulluṭsa-rabi, which seemingly was copied by Mesopotamian practitioners of medicine during their formal training.