The Historic New Orleans Collection is excited to announce a milestone. Their first app, Historic New Orleans, reached its 10,000th download! A free iPhone app, it can create "then-and-now" photo mash-ups using 400 early 20th-century images of the French Quarter and the Central Business District from their holdings. Historic New Orleans will guide you to the same spot the original photographer stood, and once there, allow you take a 21st-century photo of the location. It will then combine the new photo with the old, showing you how much has changed, and, in typical New Orleans fashion, how much hasn't! Visit the iPhone app store to download, and share your mash-ups with us!