Church of Agios Athanasios , who was patriarch of Alexandria , in the valey of Megara. It is a cross-in-square four-pillar church. From this monument originates the presentation of Agia Kuriaki which is exhibited in the Byzantine and Christian Museum of Athens. It’s one of the few rescued samples of the church’s wall-painting , one of the highest quality wall-paintings , which is estimated in the first half of the 13th century.The rescued architectural residues lead to the conclusion that the church whether belonged to a small monastery, whether was built on top of an early Christian church. Even though a lot of studiers include the church in the years of early Ottoman Empire , a more elaborate study of each individual elements suggests that the church is estimated in the 11th century.