These are amazing. Take your time studying them because there are so many incredible details in them. Click on them for larger versions.
Below is one showing the waterfront. This one is pretty cool.
Here’s one showing upper Georgetown and a little of Rock Creek. You’ll also notice there is no bridge over Q St.
Here’s a view up what is Wisconsin Ave.
This shows western Georgetown up to the college.
Source: Library of Congress
Take a look through all of these maps. See what you can find and add your comments below. A lot of the buildings still stand today and have been repurposed.