Looking for 16th Century Fortress Low-poly? Get this Polygon mesh 3D model from viktor-bublic via CGTrader for $20.
STL (Stereolithography, filesize: 153 KB), OBJ (OBJ, filesize: 239 KB), 3DS (3D Studio, filesize: 149 KB), DAE (Collada, filesize: 367 KB), FBX (Autodesk FBX, filesize: 353 KB), IGE (IGES, filesize: 299 Bytes), MAX (Autodesk 3ds Max, filesize: 290 KB), SKP (Sketchup, filesize: 1.04 MB), OTHER (Other, filesize: 91.2 KB)