This papercraft is the TNG Romulan Scout Ship, a small starship used by the Romulan Star Empire for scouting missions during the late-24th century, based on American sci-fi entertainment franchise Star Trek, the paper model is created by Ulrich Prahn.
In 2366, the Romulan scout ship Pi crash-landedon Galorndon Core, inside Federation space, while conducting an unspecified covert mission. The Pi was destroyed with an ultritium explosive after the crash to prevent its capture by Starfleet.
A few weeks later, another scout ship was encountered crossing the Neutral Zone by its occupant, Admiral Jarok, who used his vessel to defect to the Federation. Following a pursuit across the Neutral Zone from a Romulan Warbird, Jarok, too, destroyed his ship to prevent its capture by Starfleet. [Source: wikia]
You can download this papercraft model template here: Star Trek - TNG Romulan Scout Ship Free Paper Model Download [DropBox] [Gavitex] [pCloud]