section_path: History/Capital of Georgia
section_name: Capital of Georgia
paragraph_text: Capital of Georgia
  
  In 1121, after the Battle of Didgori against the Seljuks, the troops of King David IV of Georgia besieged Tbilisi, taking it in 1122. David moved his residence from Kutaisi to Tbilisi, making it the capital of a unified Georgian State, thus inaugurating the Georgian Golden Age. From the 12–13th centuries, Tbilisi became a regional power with a thriving economy and astonishing cultural output. By the end of the 12th century, the population of Tbilisi had reached 100,000. The city also became an important literary and cultural center, not only for Georgia, but also for the Eastern Orthodox world of the time. During Queen Tamar 's reign, Shota Rustaveli worked in Tbilisi while writing his legendary epic poem The Knight in the Panther's Skin. This period is often referred to as "Georgia's Golden Age" or the Georgian Renaissance.