The emperor Hadrian was well known for building ... thermal baths, banqueting rooms, a library, and even an artificial island, all decorated with exquisite mosaics, busts, and sculptures of ...

halls and reception rooms to greet foreign dignitaries, and offices for staff. Emperor Emeritus Akihito and Empress Emerita Michiko lived in the residence during the Heisei Era (1989-2019).