Why yes, that is a LEGO Millennium Falcon perched inside a diorama of Docking Bay 327, the scene of Obi-Wan and Darth Vader's battle. It was created by German builder David Wagner and measures an impressive 90cm x 100cm. The project required roughly 10,500 bricks, four months, and 1,000 € to complete.
Are there more than one Millennium Falcon available? I purchased one for my son back in August from Toys R Us for 129$. Its quite large, over 1200 pieces and took several hours to build. Looks pretty close the same one in the photo. I do see a few differences, I'm wondering if that one is a lot bigger maybe?