As you already may know, there was a fort on the top which was named after Avrami, a rich 16th century man who had his luxurious villa on the hill. Following the villa's destruction by the Turks in 1537, the venetian built a new peripheric fort when the turks attacked Corfu for a second time in 1716. The fort unfortunately was destroyed in 1864 by the british who left the island that year.
I thought there was hardly one image of it until today when I saw on "Corfu Old Photos" a 1860s rare dangerotype of Avrami fort before its destruction. As you can see in that documentary photo, the elder house was already there in the middle of the fortification and tall defensive walls run from its sides.
The area now is very different. No clue of defensive walls. Only the abandoned elder house and a small building still stand, deteriorating until they collapse and become history themselves.