This is reduced 3D polygonal model of the Roman Amphitheater in Pula (Croatia), created from 5790 photos + 3D scans. Original model has 1.1B polygons.
The goal of the project was to create high-res polygonal model and unfolded orthophoto of the amphitheatre's outer walls.
3D scanning and photogrammetry by Vektra d.o.o. - Varaždin, Croatia
http://vektra.net/en/project/pula-amfiteatar/