The Battle of Didgori is fought between the armies of the Kingdom of Georgia and the crumbling Great Seljuq Empire at a place called Didgori, 40 km west of Tbilisi, (the present-day capital of Georgia), on August 12, 1121.

The battle results in King David IV of Georgia’s decisive victory over a Seljuk invasion army under Ilghazi and the subsequent reconquest of a Muslim-held Tbilisi, which becomes the royal capital.

The victory at Didgori inaugurates medieval Georgia’s "Golden Age" and is celebrated in the Georgian chronicles as a "miraculous victory", while modern Georgians continue to remember the event as an annual September festival known as Didgoroba ("[the day] of Didgori").