Despite extensive records of Roman libraries, there is only one library preserved with the documents more or less intact: the Villa of the Papyri in Herculaneum. When archaeologists first discovered the Roman villa of Fuente Álamo in Spain, one particular room with depictions of Roman gods led them to believe that they were looking at a Mithraeum, a shrine to Mithras. Decades later, researchers revisited the site with upgraded technology—finding evidence that the chamber, dubbed Room 10, was more akin to a library. But if the latest conclusion is correct, this small chamber would be the oldest documented library on the Iberian Peninsula. Given the scarcity of Roman libraries that live on today, that would be quite exciting.