APXAIOΛΟΓΙΑ went down into the catacombs, the ancient galleries and labyrinthine passages that connect the Russian Church on Philhellenon St. with the Greek Parliament,and the Acropolis with other sites.Furthermore, following a network of underground extensions and age old connections which begin from under the center of Athens, it even managed to reach Pireus, haven of the capital. A secret world of unknown dimensions, use and age was revealed. Catacombs and cemeteries end up at underground necropoles, tunnels and galleries racing from Amalias Avenue towards various directions lead to sites of worship.Early Christian crypts enliven escape exits to ancient fortifications. All these monuments represent another expression of religious architecture in which the terms “guarding” and “protection” have a real content, since they refer to people, monuments, history and to quantities of moveable archaeological treasures.