CIRCUS MAXIMUS Low-poly (Polygon mesh 3D model) is available on CGTrader for $150. Original author: l3production. Specs: 712148 polys, 3482367 verts.
OBJ (OBJ, filesize: 187 MB), 3DS (3D Studio, filesize: 187 MB), DAE (Collada, filesize: 187 MB), FBX (Autodesk FBX, filesize: 187 MB), HRC (Autodesk Softimage, filesize: 187 MB)