Check out Medieval Castle 01 - 4K Textures Game Ready Low-poly 3D model on CGTrader for $9. High-quality mesh by bakhodir999: 527639 polys, 561446 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 73.3 MB), OBJ (OBJ, filesize: 73.5 MB), FBX (Autodesk FBX, filesize: 27.8 MB)