Historical City Maps

Regular readers of this blog know that I am enamored of maps, and especially historical maps. So I was very excited to see that the Library of Congress has a free collection of historical city maps. You can see what Manhattan or San Francisco used to look like a century ago. The image below is a bird's eye view of Washington DC in 1883. You can see the Washington monument and the Capitol Building, but the Jefferson and Lincoln Memorials were not yet built.