Year 1273 (MCCLXXIII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. Events By place Europe January 22 – Sultan Muhammad I (or Ibn al-Ahmar) suffers fatal injuries after falling from his horse near the city of Granada during a minor military expedition. He is succeeded by his son Muhammad II, who becomes ruler of the Emirate of Granada. Muhammad enters negotiations with King Alfonso X (the Wise) to make peace with Castile, but he refuses to grant a truce to the Banu governors (arraeces) of Málaga and Guadix in Andalusia. Autumn – Muhammad I sends an embassy to the court of Alfonso X in Seville, where it is received with honour. Alfonso agrees to Granada's demands, to end his support for the Banu Ashqilula, in exchange for the promise that Muhammad becomes Alfonso's vassal. Muhammad pays him 450,000 maravedis each year in tribute and grants the Banu rebels a truce for two years. October 1 – Rudolf I is elected King of Germany over the rival candidate Ottokar II, king of Bohemia, ending the Great Interregnum. He is the first of many Habsburgs to hold the throne and is crowned in Aachen Cathedral, on October 24. Ottokar refuses to acknowledge Rudolf as the new ruler and is placed under the imperial ban, leading to the outbreak of war in 1276. The , with its decisions (), is the oldest surviving document written by the Croatian parliament (or Sabor). Middle East July – Mamluk forces under Baibars capture the last remaining stronghold of the Hashashin (or Assassins) sect, Al-Kahf Castle. August – Mongol forces surround the castle of Al-Bira. Baibars skirts around the enemy with camels and wagons. He launches a devastating attack and routes the Mongols. December – Followers of Jalal al-Din Muhammad Rumi, Persian poet and mystic, establish the Mevlevi Order (Whirling Dervishes) in the city of Konya (approximate date). Asia March 14 – Battle of Xiangyang: Chinese forces surrender to Kublai Khan's general Aju (or Achu) after a 6-year siege. The battle is the first in which firearms are used in combat. In Korea, the Sambyeolcho Rebellion against the Goryeo Dynasty (a puppet government of the Yuan Dynasty) ends as rebel forces are defeated. By topic Art and Science The Holy Redeemer khachkar, believed to be one of the finest examples of art, is carved in Haghpat (modern Armenia).