$12 indian stone arch 3D model by prajjwal. Available on CGTrader with 2014 polys and 3521 vertices. Check it out on CGHub.
SKP (Sketchup, filesize: 1.67 MB), OBJ (OBJ, filesize: 7.33 MB), FBX (Autodesk FBX, filesize: 21 MB), DAE (Collada, filesize: 9.51 MB), DXF (DXF, filesize: 20.1 MB), DWG (AutoCAD, filesize: 6.44 MB), 3DS (3D Studio, filesize: 6.34 MB), STL (Stereolithography, filesize: 6.14 MB)