Doctor of the Church (Latin doctor "teacher"), also referred to as Doctor of the Universal Church (Latin: Doctor Ecclesiae Universalis), is a title given by the Catholic Church to saints recognized as having made a significant contribution to theology or doctrine through their research, study, or writing.
As of 2020[update], the Catholic Church has named 36 Doctors of the Church. Of these, the 17 who died before the Great Schism of 1054 are also held in high esteem by the Eastern Orthodox Church, although it does not use the formal title "Doctor of the Church" in the same way that Catholics do.
Among these 36 are 27 from the West and 9 from the East; 4 women; 18 bishops, 12 priests, 1 deacon, 3 nuns, 1 consecrated virgin; 26 from Europe, 3 from Africa, 7 from Asia. More Doctors (12) lived during the 4th century than any other; eminent Christian writers of the 1st, 2nd and 3rd centuries are usually referred to as the Ante-Nicene Fathers, while the 9th and 20th centuries have so far produced no Doctors at all. The shortest period between death and nomination was that of Alphonsus Liguori, who died in 1787 and was named a Doctor of the Church in 1871 – a period of 84 years; the longest was that of Ephrem the Syrian, which took fifteen and a half centuries.
Some other churches have similar categories with various names.