Athens remembers the Emperor Hadrian as a friend and benefactor 1900 years after his reign. His Library stood to the north of the Acropolis in a space now crowded in by modern Greek life. The Manastikaki train stain is just off the bottom left of the photo. The narrow lane running up the left side from the domed building is a tourist market. The official AEK Athens store is at the upper left corner. If you explore the area on Google Street View it will give you a strong sense of how the site is an archaeological excavation -- the surrounding streets are a storey above it. Source.