For several centuries the Kingdom of Georgia lasted.
The Kingdom of Georgia , also known as the Georgian Empire , was a medieval monarchy which emerged in circa 1008 AD . It reached its Golden Age of political and economic strength during the reign of King David IV and Queen Tamar the Great from 11th to 13th centuries . Lasting for several centuries , the kingdom fell to the Mongol invasions in the 13th century , but managed to re-assert sovereignty by the 1340s .