The church was erected in the 16th century over the ruins of an ancient temple of Hercules and it was the Metochi of the Penteli Monastery, while in the same area there was an Old Christian basilica. The name Agia Dynami refers to the Virgin Mary and was given to the church so that all pregnant Athenian women would give birth to strong children. For this reason the church’s celebration takes place of September 9th, day of the birth of Virgin Mary.
— https://www.athenskey.com/agia-dynamis.html

Photos taken by Luke Cabading.