exhibition, "The Aztec World: A Unique View of a Mighty Empire,"...Field Museum in Chicago

This undated photo provided by the Field Museum in Chicago shows a greenstone sculpture of Quetzalcoatl, the creator god who was associated with both rain and water and also a patron of the arts. The sculpture is part the exhibition "The Aztec World: A Unique View of the Mighty Empire," that opened at Chicago's Field Museum Sunday, Oct. 26, 2008, and features nearly 300 artifacts, many never before seen outside Mexico. The exhibit runs through April 19, 2009 and is not scheduled to appear in any other museums.

An undated photo provided by the Field Museum in Chicago shows a life-size ceramic eagle sculpture that stood at the entrance to the House of Eagles, and appears to have been a building closely associated with the coronation of Aztec emperors. The "House of Eagles" forms the centerpiece of the exhibition, "The Aztec World: A Unique View of a Mighty Empire," which opened Sunday, Oct. 26, 2008, at Chicago's Field Museum. It features nearly 300 artifacts, many never before seen outside Mexico. The works come from 10 major Mexican museums, as well as from the Field's own collection, and the exhibition took four years to assemble. It runs through April 19, 2009 and is not scheduled to appear in any other museums.

An undated photo provided by the Field Museum in Chicago shows a sculpture depicting Tlaloc, the god of rain, recognizable by the fanged his teeth and goggle eyes. The sculpture is part the exhibition "The Aztec World: A Unique View of the Mighty Empire," that opened at Chicago's Field Museum Sunday, Oct. 26, 2008, and features nearly 300 artifacts, many never before seen outside Mexico. The works come from 10 major Mexican museums, as well as from the Field's own collection, and the exhibition took four years to assemble. It runs through April 19, 2009 and is not scheduled to appear in any other museums.