Kaisariani Monastery

Overlooking the Kaisariani district from a hill a short distance from Hymettus, the Kaisariani Monastery stands some 350 metres high. Theories abound about the origins of its name (perhaps related to the word Syrian), but this question is unresolved. The Monastery is dedicated to the Presentation of the Virgin Mary. Believed to date back to the late 11th century, the four-column, cruciform church has been expanded – with its Chapel of St. Antony and narthex added under Ottoman occupation. The monastery also includes baths from the Byzantine era and preserved frescoes from the 17th and 18th centuries.
Just to the north of the monastery lies the Kalopoula, an ancient natural spring; Kriokephali and Agiasma are also nearby. As with all Greek monasteries under German occupation, this one closed down as well.

Reference: www.athensattica.gr