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The [[Catechetical School of Alexandria]] is the oldest catechetical school in the world. Founded around 190 by the scholar [[Pantanaeusof Alexandria|Pantanaeus]], the school of Alexandria became an important institution of religious learning, where students were taught by scholars such as [[Athenagoras of Athens|Athenagoras]], [[Clement of Alexandria|Clement]], [[Didymus the Blind|Didymus]], and the great [[Origen]], who was considered the father of theology and who was also active in the field of commentary and comparative Biblical studies. Origen wrote over 6,000 commentaries of the [[Bible]] in addition to his famous ''[[Hexapla]]''. Many scholars such as St. [[Jerome]] visited the school of Alexandria to exchange ideas and to communicate directly with its scholars. The scope of this school was not limited to theological subjects; science, mathematics and humanities were also taught there. The question and answer method of commentary began there, and 15 centuries before Braille, wood-carving techniques were in use there by blind scholars to read and write.