[2] Other notable theologians with a connection to the school include Origen, Gregory Thaumaturgus, Heraclas, Dionysius "the Great", and Didymus the Blind.Apart from subjects like theology, Christian philosophy and the Bible; science, mathematics and Greek and Roman literature, logic and the arts were also taught.The question-and-answer method of commentary began there, and, 15 centuries before Braille, blind students at the school were using wood-carving techniques to read and write."For about two centuries before the birth of Christ, and the same period after it, Alexandria was the great seat of intellectual culture and home of Greek philosophy.The streets were based on Aristotle's ideal urban plan; they were designed on a rectangular grid and oriented south-west to provide shelter from the north wind and take advantage of the westerly breeze.At the heart of the classical city lay the Museion, the first public research institution, and the Great Library, said to contain 700,000 scrolls.The Museum and the Library were not open to the public but reserved for scholars who undertook research in philology, the mathematical sciences and astrology.The first director of the Library, Eratosthenes, was the first person to calculate the circumference of the earth, coming within two per cent of modern measurements."[8] The supporters of Pantaenus "looked on this philosophy as a 'Gift of God', a 'Work of Divine Providence,' which was intended to be for the Gentiles what the Law has been for the Jew, viz,.[9] "The first great figures of the Church in Egypt were scholars rather than bishops, directors of the Catechetical School of Alexandria: Clement (160–215) and Origen (185–251).