The Louvre in Paris is which sort of building?

By the looks of it, it seems to take days to explore fully

I’ve visited it years ago on a school trip to Paris! On the outside you just see a piramide shape, making you think you’ll see everything in half an hour! Lol nope that museum is huge! Inside we all felt a little creepy. Some say that under the museum is a labyrinth of tombs. We didn’t really believe it till we had that creepy feeling! In the end, no one really knows what lays under it! To restore old famous paintings? Or preserve the painters themselves? It was a trip so unforgettable, we still talk about that weird creepy feeling! It’s worth to check it out though!

Bucket list destination !

I've seen only the outside of it, so many people taking cool pictures posing next to the glass pyramid (there's also a slightly smaller one next to the big one!)

I'd love to visit. not sure why it's looks a bit creepy tho

This question was so easy.