Start at Union StationLibrary of Congress 8:30am – 4:30pm Tu – Sa https://www.loc.gov/visit/Renwick Gallery 10am – 5:30pm daily https://americanart.si.edu/visit/renwickNational Gallery of Art 10am – 5pm M – Sa 11am – 6pm Su https://www.nga.gov/visit.htmlPostal Museum 10am – 5:30pm https://postalmuseum.si.edu/visit/index.html Louisiana & D St NW; X1 bus Foggy Bottom Station, 9 stops, Constitution Ave NW & 12th…