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The [[Catechetical School of Alexandria ]] is the oldest catechetical school in the world. Founded around 190 by the scholar 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.