I created a repository for a simplified sponza scene with Urho3D .mdl models here https://github.com/Lumak/Urho3D-Assets derived from Crytek’s obj file.
For a full version, there’s a link on the respository to Crytek’s obj file which you can download.
The scene file is SponzaSimple/SceneSponzaSimple.xml file.
Probably useful if you’re doing any kind of GI testing.