Athens. Greece. An archway stands on the original 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 four standing columns survive. 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.