Among the ruins on the Palatine Hill is a structure that experts believe was built for Emperor Augustus' wife, Livia. It's known as the House of Livia, and is still being excavated.
The House of Livia was probably built in the early 1st century B.C.E., with frescoes added later in that century. Livia made this her primary residence, staying even after the emperor had died, when her son Tiberius became Rome's second emperor. The building's frescoes are wonderfully well-preserved, and feature an ancient trompe l'oeil effect with painted ceilings designed to look like coffers and painted scenes made to look like views through open windows.