Ever heard of the the Flickr Commons? The goal is to share the treasures of the world's public photography archives, and secondly to show how your input and knowledge can help make these collections even richer. Flickr photographers are invited to help describe the photographs they discover in The Commons on Flickr, either by adding tags or leaving comments.
The newest member of the Commons is the D.C. Public Library, with some wonderful old photographs of our Nation's Capitol. The collection features historic images of D.C.’s buildings and federal memorials, Arlington National Cemetery, historic houses, and street scenes, portraits of past presidents and other prominent Americans.
Here's a scene from one hundred years ago, the inauguration of President Taft.