Historical Context
Jalal al-Din Mangburni, the last ruler of the Khwarazmian dynasty, conducted a campaign against the Kingdom of Georgia that began with his victory at the Battle of Garni in 1225. When he marched on Tbilisi, Queen Rusudan fled the capital. The Georgian defenders resisted fiercely but were overwhelmed, in part because local Muslims within the city assisted the Khwarazmian forces in breaching its defenses.
After taking the city, Jalal al-Din had the dome of Sioni Cathedral torn down and replaced with his own throne as a symbol of conquest. The killing of the Christians who refused to apostatize is recorded both in Georgian sources and by Muslim historians. Ibn al-Athir and Nasawi, the biographer of Jalal al-Din, confirm that Christians were killed, and the Armenian historian Kirakos Gandzaketsi documented forced conversions, the mistreatment of women, the destruction of churches, and the removal of Christian crosses.