Constructed between 65 and 68 AD by one of Rome's most notorious emperors, the eponymous Golden House of Nero was a lavish palace complex that played host to the Emperor’s wild parties and banquets. The large, octagonal room had a concrete dome, most likely covered in glass mosaic. Roman historian Suetonius tells us of a 'circular banquet hall, which revolved incessantly, day and night, like the heavens.' He describes gem-encrusted walls, ivory and mother-of-pearl decorations and ceilings that showered guests with flowers and perfumes. Sounds like the height of luxury.