The Nea or Hagia Mone of Areia near Nauplia which was founded, according to the dedicatory inscription, in 1149 by Bishop Leo of Argos, clearly depicts the changes that developed in the Greek school in the 12th century. The church is built on a podium and the lateral walls incorporate crosses made of stone. The window frames of the windows are made of porous stone and the upper part of the monument is surrounded by a highly textured meandre zone made of brick. Similar elements are also found also in three churches of the Argolid region: in the Koimesis (Dormition) in Chonika, in the Church of St John in Ligourio (both date from the beginning of the 12th century), as well as in the Church of Theotokos (Virgin Mary) in Merbaka, which is one of the more interesting Byzantine monuments. The latter, however, built on a three-stepped podium, with big stones (following the opus isodomum system) up to the lintel of the doors, was recently re-dated by researchers to the 13th century. An equally interesting building can be found in Athens, next to the today's Metropolis (Cathedral). This is the Panagia (Virgin) Gorgoepikoos, known as St Eleutherios or Little Metropolis. This small church is built entirely of ancient materials: the lower part is made of marble blocks that follow the opus isodomus system, whereas above the door are more than 90 classical, Roman and Early Byzantine sculptures. M. Chatzidakis, the most reliable authority in this matter, links the obvious antique influences evident in the monument with the Metropolitan of the city, Michael Choniates, a scholar known to be deeply affected by his classical education, and using this evidence dates the church to the end of the 12th century .