The Catechetical School of Alexandria (founded c.a. 190) was a place for the training of Christian theologians and priests. The teachers and students of the school (also known as the Didascalium)were influential in many of the early theological controversies of the Christian church. Theology is literally rational discourse concerning God (Greek θεος, theos, God, + λογος, logos, rational discourse). By extension, it also refers to the study of other religious topics. ... It has been suggested that Christian theological controversy be merged into this article or section. ... The term Christian Church, or Catholic Church, as it was known by Christians beginning in the second century, expresses the idea that organised Christianity (the Christian religion) is seen as an institution. ...

The earliest recorded instructor at the School, and the probable founder, was Saint Pantaenus. He was succeeded as head of the school by his student Saint Clement. Clement of Alexandria (Titus Flavius Clemens), was the first member of the Church of Alexandria to be more than a name, and one of its most distinguished teachers. ...

Other notable theologians with a connection to the school include Origen, Gregory Thaumaturgus, Athenagoras, Heraclas, Dionysius "the Great", and Didymus the Blind. Others, including Jerome and Basil, made trips to the School to interact with the scholars there. Origen (Greek: Ōrigénēs, 185–ca. ... Gregory Thaumaturgus (c. ... Athenagoras has been the name of several notable Greek individuals: Athenagoras of Ephesus, a tyrant of Ephesus around the 6th century BC Athenagoras of Athens (circa 133-190), early Christian philosopher Patriarch Athenagoras (1886-1972), Patriarch of Constantinople from 1948 to 1972 Athenagoras is also the title of a 1682... Dionysius served as Patriarch of Alexandria (head of the church that became the Coptic Church and the Orthodox Church of Alexandria) between 248 and 264. ... Didymus (?309-?394), surnamed the Blind, was an ecclesiastical writer of Alexandria, was born about the year 309. ... Saint Jerome redirects here. ... Basil (ca. ...