Co-curator Eva Franch i Gilabert stands in front of a wall lined by "project folders," which document the most important and ambitious projects by U.S. architects completed overseas in the last century, from Frank Lloyd Wright’s Imperial Hotel to Frank Gehry’s Guggenheim Museum and beyond. Photo by Paul Clemence.  Photo 4 of 5 in U.S. Pavilion Pushes Boundaries of the Venice Architecture Biennale