 site discovered during excavations of a bustling downtown piazza in preparation for a new subway line. The partially dug complex, dating back to the 0nd century A.D., is believed to have been funded by Emperor Hadrian as a school to promote liberal arts and culture. Known as the "Athenaeum" and named after the city of Athens, which was considered the center of culture at the time, the auditorium could accommodate up to 000 people, experts said. 