Check out Medieval Set - 2 Towers - Different Walls - Ring Wall - Stones Low-poly 3D model on CGTrader for $12.99. High-quality mesh by ML-3DCorner: 4008 polys, 7524 vertices. PBR, Textured.
STL (Stereolithography, filesize: 196 KB), OBJ (OBJ, filesize: 609 KB), ASD (Adobe Dimension, filesize: 13.1 MB), TEXTURES (Textures, filesize: 1.1 MB), FBX (Autodesk FBX, filesize: 398 KB), GLTF (glTF, filesize: 1.97 MB), ABC (Alembic, filesize: 210 KB), BLEND (Blender, filesize: 3.07 MB), DAE (Collada, filesize: 903 KB)