Archaeologists from the Department of Cultural Heritage of the Rome Municipality came across the 50-foot-deep (15-meter-deep) cavity while working to restore the decaying palace.

• 来自罗马市文化遗产部的考古学家们是在修复日渐衰败的皇宫的时候偶然发现这处深50英尺（15米）的洞穴的。