The Koules of Grammeni, also known as the Koules of Grigoria or Magarikari, is an Ottoman fortress in Crete, Greece. Built in the late 19th century during the Great Cretan Revolution (1866-1869), it was strategically positioned between the villages of Grigoria and Magarikari overlooking the Messara Plain. Measuring 25 meters by 11 meters, with 24 embrasures, it was used as a stronghold by the Ottomans to maintain control over the rebellious Cretan population. In May 1944, it provided refuge to the villagers of Magarikari during the German occupation. Today, the Koules of Grammeni stands as a well-preserved reminder of Crete's turbulent past and the island's enduring spirit.