Over the years, one of the most common uses of Layar and Augmented Reality has been to look into the past with location-specific photographs or 3D models. Whether it’s the Berlin Wall, earthquake-damaged buildings in San Francisco or just a small town in a simpler time, AR is a great way to instantly travel back in time.

It’s in this same vein that the recently created ERA Girona experience was published as a Geo Layer on the Layar App. Those visiting Girona in Spain’s Catalonia region can use the layer to take a look into the city’s past by browsing for nearby historic photos.

The layer is part of the International Augmented Med program started by geographer Laura Olivas. It is funded in part by the European Union and by the Catalan government, and the city council of Girona agreed to allow the use of the photos. The name “ERA” is actually a clever play on words, as “era” means both a period of time in English, Spanish and Catalan, as well as “it was” in Spanish and Catalan. And of course, “RA” is the abbreviation for “Realitat Augmentada.”

More than 50 photos from the turn of the 20th century display Girona’s cultural heritage, including monuments, historical buildings and daily life. Users can search for “ERA Girona” in the Layar App to launch the layer. They only need to look around them with their phone or tablet to discover and view the nearby photographs.

Mouse over this image for an example.

“Every inch of Girona’s stones has plenty of history: the old town, the jewish quarter, the walls, the cathedral, etc,” the project says. “You don’t need Augmented Reality to feel the heritage of such a historical spot. But with ERA Girona, we have collected a series of old photographs, conveniently located along the city through points of interest, enriching your visitor experience letting you compare old photographs with the current status of the same spot.”

Mouse over this image for an example.

The project has gained the attention of the local media, inspiring a segment on a local TV news show and an article in a Catalan newspaper.

As fans of history, we here at Layar see Augmented Reality as an amazing tool for learning more about the past. Already, layers like the Berlin Wall layer allow people to see history come alive through 3D models.

Another fascinating example of this type of Augmented Reality is in the works as part of a collaboration between Lightning Laboratories’ Gene Becker and Stanford University Knight Fellow Adriano Farano. Becker, who is focused on experience design for blending physical and digital storytelling, and Farano, who is looking to find ways to use AR in journalism, have been experimenting with historical photographs in Layar and Hoppala, a tool for creating Layar content.

By making historical photographs viewable as objects within Layar at the locations where they were taken, viewers can achieve a better grasp on history - and the early tests by Becker and Farano look very intriguing.

The pair chose to use historical photos of Stanford as their first test images - specifically those from before a massive earthquake in 1906. Several parts of the old campus were damaged or destroyed in the earthquake, and the evidence of missing architecture comes alive through Augmented Reality.

In the example above, the square structure on the right of the picture is actually the base of the right leg of the arch in the old photograph. Memorial Arch, as it was known, had to be demolished due to damage it received during the earthquake. In another example, a present-day statue is revealed to be the same as one which plunged through a sidewalk after being knocked from its perch during the quake.

The great thing about historical photographs is that there are millions of them in libraries and archives around the world, and dropping them into Layar is not terribly difficult. With Layar Creation Tools like Hoppala (which we will be profiling later this week), this process is even easier. We are excited to see what else Becker and Farano can create with further experiments!