Chufut Kale in Turkish means "Jewish Fortress." Chufut Kale was populated by Karaim, the Turkish-speaking tribe who confessed Jewish belief. The city was hidden on elevated Yailas, or plateaus, in the central part of the 150+ miles wide peninsula. The city's prosperity time were 4th - 11th centuries. After the Mongol invasion in 1223, the city slowly fell into decay.