historypin? It's a way to collect archival material and place it on a map. Here's a brief note from the creators: Anyone can pin photos, videos or sounds to the Historypin map. Compare images of then and now. Group them into collections. Share them with friends. Invite other people to participate.This past weekend, I contributed to a map of NC State University. My assignment was to write a brief history of D.H. Hill Library, find a photograph of it that I had permission to share, and pin it to our group's map.