in 2008, the u.s. national park service submitted taliesin west along with nine other frank lloyd wright properties to a tentative list for world heritage status. the 10 sites have been submitted as one single site. the january 22, 2008, press release from the national park service website announcing the nominations states that, "the preparation of a tentative list is a necessary first step in the process of nominating a site to the world heritage list." after revised proposals, the properties were inscribed on the world heritage list under the title "the 20th-century architecture of frank lloyd wright" in july 2019.