This Mario papercraft is the Princess Peach's Castle (aka Mushroom Castle), based on the Super Mario series, the paper model was created by Gipi. Princess Peach's Castle is the castle in which Princess Peach and many Toads, including Toad and Toadsworth, reside. The rooms inside the castle vary from game to game, as can the castle's location. It is recognized by a tall tower standing in the center of the castle and is supported by four towers along the outside walls in most games.
In main Mario titles the castle is normally seen on grassy plains away from civilization while Paper Mario series sometimes depicts it in a busy town. Super Mario Galaxy and it's successor however show it to be in the same town but in a less crowded area. Although this general statement can vary, the castle is always found in Toad Town. For more information of the Princess Peach's Castle please click on here.
You can download this mario paper craft template here: Super Mario - Princess Peach's Castle Free Papercraft Download