As part of Docomomo US’s annual Tour Day on Oct. 13, 2018, Docomomo DC will host a walking tour focusing on the design evolution of America’s Main Street: Pennsylvania Avenue. Buy tickets to Tour Day 2018. While the world-famous boulevard connects the U.S. Capitol to the White House, it also includes a number of hidden modernist gems. Docomomo DC will explore the development of Pennsylvania Avenue from Pierre L’Enfant’s plan to the 20th-century work of the Pennsylvania Avenue