Monastery du Grand Martyr Prince Tadros. The outside of the monastery consists of Coptic cemetery and Catacombs. The monastery dating back to the time of the pharaohs was dedicated to St. Tadros (Theodore), a Roman officer under the Emperor Diocletian. He refused to worship Apollo and was consequently nailed to a tree with 153 nails for going against the emperor’s wishes. He was given Sainthood in the Orthodox churches.