Lead archaeologist Francoise Villedieu says her team discovered part of a circular room, which experts believe rotated day and night to imitate the Earth's movement and impress guests.
Villedieu told journalists Tuesday that the room on the ancient Palatine Hill was supported by a pillar with a diameter of 4 meters (more than 13 feet). She says only the foundation of the room was recovered during the four-month excavation.
The Golden Palace, also known by its Latin name Domus Aurea, rose over the ruins of a fire that destroyed much of Rome in 64 A.D. and was completed in 68 A.D.
