If your goal is a physical miniature, here is specific advice for the of the Masjid Al Haram 3D model.
Owned by Shutterstock, TurboSquid rarely offers free commercial assets, but they have a "Free 3D Models" section for personal projects. masjid al haram 3d model free download
Free assets often require a bit of cleaning up before they are production-ready. If your goal is a physical miniature, here