$10 Medieval French Castle Low-poly 3D model by SimonTGriffiths. Available on CGTrader with 83300 polys and 74300 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 3.97 MB), OBJ (OBJ, filesize: 10.6 MB), 3DS (3D Studio, filesize: 3.03 MB), ABC (Alembic, filesize: 4.46 MB), FBX (Autodesk FBX, filesize: 1.56 MB), DAE (Collada, filesize: 7.95 MB), TEXTURES (Textures, filesize: 31.3 MB)