Check out Castle Stairs Low-poly 3D model on CGTrader for $14. High-quality mesh by olgko3d: 52439 polys, 52280 vertices. Textured, UV Mapped.
OBJ (OBJ, filesize: 1.98 MB), MAX (Autodesk 3ds Max, filesize: 126 MB), FBX (Autodesk FBX, filesize: 458 KB)