Penteli Monastery, located on Penteli Hill, is an important spiritual center for Orthodox Christians. Founded in 1578, the monastery was built on the ruins of an ancient temple dedicated to the god Apollo.The monastery features a three-aisled church, a library and a series of cells for monks. The church is decorated with beautiful frescoes and Byzantine icons, some of which date back to the 17th century.Penteli Monastery is a place of great historical and cultural importance to Greece. During the Turkish occupation, the monastery played an important role in the struggle for Greek independence, hosting numerous meetings among Greek patriots.Today, the monastery is still an active spiritual center, but it is also a popular tourist destination because of its architecture and scenic location, which offers a breathtaking view of the Aegean coast.To visit Penteli Monastery, you should wear modest clothes and cover your shoulders and legs. Also, it is advisable to inquire about opening days and hours, as the monastery may be closed for religious events or maintenance.