The Capitoline Museums are a single museum containing a group of art and archeological museums in Piazza del Campidoglio, on top of the Capitoline Hill in Rome, Italy. The historic seats of the museums are Palazzo dei Conservatori and Palazzo Nuovo, facing on the central trapezoidal piazza in a plan conceived by Michelangelo Buonarroti in 1536 and executed over a period of more than 400 years.