Athens. Greece. View of the ruins of the inner peristyled courtyard atrium of Roman Emperor Hadrian’s lavish Library built in 131 AD in Athens. Occupying the courtyard from 425 AD was a monumental Tetraconch Christian church which was then replaced by a 7th century church of which the four standing columns survive. The courtyard was surrounded by porticos with a total of 100 columns. The library complex consisted of a vast library, a large courtyard with a garden and central pool, mosaics floors, numerous rooms and a facade adorned with Corinthian columns.