Maymun-Diz significant event Siege of Maymun-Diz
Maymūn-Diz (Persian: میمون دز) was a major fortress of the Nizari Ismailis of the Alamut Period described in historical records. It has been variously identified with the Alamut Castle, Navizar Shah Castle, Shirkuh Castle, Shahrak Castle, and Shams Kalayeh Cave. Recently, Enayatollah Majidi located it on top of Mount Shatan (کوه شاتان Kūh-e Shātān; 36.4762463°N 50.6069645°E﻿ / 36.4762463; 50.6069645) near Khoshk Chal.The fortress was surrendered by Imam Rukn al-Din Khurshah, who was residing there, to the invading Mongols under Hulagu Khan and was subsequently demolished. This was followed by surrender of Alamut and almost all other strongholds and the disestablishment of the Nizari state.