The Acropolis Museum is an archaeological site-specific museum of the 21st century, housing the most famous works of antiquity. The rich collections provide visitors with a comprehensive picture of the human presence on the Acropolis, from pre-historic times through late antiquity. Integral to this program is the display of an archeological excavation on the site of the Museum itself: ruins from the 4th through 7th centuries A.D., left intact and protected beneath the building.'