Olmec Head 3D Scan by 3DWP is licensed under the Creative Commons - Attribution - Non-Commercial - Share Alike license.
This is a 123D Catch 3D scan of an Olmec sculpture replica at the Smithsonian Natural History Museum. It was made by Nick Bontrager: http://www.123dapp.com/catch/Smithsonian-Natural-History-Museum-Colossal-Head-4-replica-/5111161
I edited the file for 3D printing by making it solid and sculpting parts that were missing. I also scaled and oriented the model. See http://www.meshmixer.com to download this mesh editing software for free, on http://www.mmmanual.com is more info about the features.
''Colossal Head 4 (replica) Olmec Culture San Lorenzo Tenochtitlan Veracruz Mexico 1200 - 900 B.C.E. Gift to the Smithsonian Inst from the gov't of the state of Veracruz Mexico & the Washington Center for Internships & Academic Seminars Oct 2001''