In 2019, eight buildings designed by Frank Lloyd Wright were added to the UNESCO list of World Heritage Sites. They span six decades of his long career and include significant residential, religious, and institutional buildings constructed between 1905 and 1959. Bill Keene, a lecturer in urban studies, architecture, and history, reviews the nature of the UNESCO list, its criteria for inclusion, and the steps in the more than 15-year nominating process needed to consider the architect’s buildings for designation.