This paper model is a Panzer VIII Maus, a German World War II super-heavy tank completed in late 1944, created by World of Tanks website. Maus is the heaviest fully enclosed armoured fighting vehicle ever built. Only two hulls and one turret were completed before the testing grounds were captured by the advancing Soviet forces. An uncompleted tank was captured by British forces. For more information please click on: WWII Panzer VIII Maus Tank Paper Model; also another papercraft version here: Panzer VIII Maus Tank Papercraft.
You can download this tank papercraft template here: WWII Panzerkampfwagen VIII Maus Tank Free Paper Model Download