5 Dollars Hagia Sophia

Palau has issued commemorative silver under its agreement with the U.S. dollar system since 1994, leveraging its status as a sovereign nation in free association with the United States to produce coins that circulate as legal tender but are designed entirely for the collector market. The Hagia Sophia issue belongs to a long-running series of world monument and religious site coins that Palau contracted through European minting houses during this period.

The Hagia Sophia itself has been simultaneously a cathedral, a mosque, and a museum — converted by Mehmed II in 1453 and secularized by Atatürk in 1934. In 2020, Turkey reversed that secularization by presidential decree.