My wife and I went to Rome earlier this month, and one of the places we visited was Palatine Hill, which was the site of the Roman emperors' palaces. And we learned that the word palace comes from Palatine. In the photo, Palatine Hill is in the background, fronted by the arched ruins. Here's the OED etymology for palace:
Anglo-Norman and Old French palais, paleis, meaning vast and luxurious residence belonging to or having belonged to an important person, royal residence (11th cent.; Middle French, French palais), from the classical Latin Palatium, originally the name of one of the seven hills of Rome ... hence imperial residence or temple on the Palatine hill, imperial or royal residence in general.