The author of the 3D image has uploaded their model through Google 3D Warehouse which allows: [O]ther end users of the Services a perpetual, sublicensable, irrevocable, worldwide, royalty-free, and non-exclusive license to reproduce, adapt, modify, translate, publish, publicly perform, publicly display and distribute any Content or derivative works thereof...

You retain the right to: (a) make content that you upload to 3D Warehouse using Google SketchUp or third party services available under different license terms, and (b) stop distributing such Content through 3D Warehouse at any time; provided, however that any such election will not serve to withdraw the license granted under these Terms.

The copyright of this building is in the public domain, as it's age is over two thousand years old. While the work itself may retain some copyrights (such as attribution) the design aspects are not original works of this author.