The ordination of women to ministerial or priestly office is an increasingly common practice among some contemporary major religious groups. It remains a controversial issue in certain Christian traditions and in most denominations in which "ordination" (the process by which a person is understood to be consecrated and set apart by God for the administration of various religious rites) was often a traditionally male dominated profession (except within the diaconate and early church movement known as Montanism).
In some cases, women have been permitted to be ordained, but not to hold higher positions, such as (until July 2014) that of bishop in the Church of England. Where laws prohibit sex discrimination in employment, exceptions are often made for clergy (for example, in the United States) on grounds of separation of church and state. The following aims to provide a comprehensive overview of the ordination of women from ancient to contemporary times. Religious groups are ordered alphabetically, while subgroups may be ordered chronologically (e.g. Christian denominations).
Sumerian and Akkadian EN were top-ranking priestesses distinguished by special ceremonial attire and holding equal status to high priests. They owned property, transacted business, and initiated the hieros gamos ceremony with priests and kings. Enheduanna (2285–2250 BC), an Akkadian princess, was the first known holder of the title "EN Priestess".
Ishtaritu were temple prostitutes who specialized in the arts of dancing, music, and singing and served in the temples of Ishtar.
Puabi was a NIN, an Akkadian priestess of Ur in the 26th century BC.
Nadītu, sometimes described as priestesses in modern literature, are attested from various cities from the Old Babylonian period. They were recruited from various social groups, ranging from craftsmen to royal families, and were supposed to remain childless; they owned property and transacted business.
In Sumerian epic texts such as Enmerkar and the Lord of Aratta, Nu-Gig were priestesses in temples dedicated to Inanna, or may be a reference to the goddess herself.