this is the structure of one of the small pyramids of Louvre, the big one is too complicated for me right now, I started with sketchup only two months ago, i don't have accurate plants so the model is not 100% scaled, but the structure is pretty much the same, I hope you like it.

by the way the stairs beside the pyramid is for the "walk tool" and is not part of the real buliding...

this is the real one

this is the sketchup one