« Previous Next » 15c American Architecture block View Full Size All Images Cachet with illustration of George Washington Masonic National Memorial for 15c American Architecture block, #1841 Format Other Tags 1980s Architecture Block GeorgeWashington Masonic OfficialFirstDay Unaddressed Dates & Locations Oct. 3, 1980 New York, NY, US Related Covers 20c American Architecture block Furness 1839-1912 Penn Academy Philadel… 18c American Architecture block American Architecture 1981 block Historic Preservation Block House of Farnham Nudes