HAMILTON, ONTARIO—Spencer Pope of McMaster University, Peter Schultz of Concordia College, and David Scahill of the American School of Classical Studies at Athens think that the city-state of ancient Athens may have stored reserves of coins in the Parthenon’s attic. Writers in antiquity noted that the Athenian reserves sometimes reached 10,000 talents—a staggering sum of silver coins that could have potentially weighed 260 metric tons. However, the ancient records do not mention exactly where on the Acropolis the coins were stored. Very little of the Parthenon’s attic still exists, but estimates suggest that it was 62 feet wide by 164 long, with a floor made of thick beams of wood from cypress trees. There are also remnants of a utilitarian staircase that could have been used to move money to and from the attic, where coins could have been spread across the floor space to distribute their weight. “The attic of the Parthenon is the only suitable space large enough to hold all of the coins in the Treasury. While we cannot rule out the possibility that coins were distributed across numerous buildings, we should recall that the attic is the most secure space,” Pope told Live Science. To read more about money from this period, go to "Mysterious Greek Coins Studied."