The Louvre is the greatest remodel ever. It started with a moated fortress in the 12th century, on a spot known as the "Louvre" and grew and grew from there. The original hovel was torn down to build a proper monarch's residence in the 1600's... which is now known as Pavillion Sully. You can still see the original foundations in the "Medieval Louvre" department of the building you see here. I say that without proper authority - since it's something we didn't actually get to see. I was in Paris for a recording job, with very little sightseeing time. We had to choose between seeing alot of outsides of things or one or two insides of things. We opted for the former - and plan to return for the latter.