The crown is decorated with about 2,800 diamonds, most notably the Koh-i-Noor in the middle of the front cross, which was acquired by the East India Company after the Anglo-Sikh Wars and presented to Queen Victoria in 1851, and a Turkish diamond given to her in 1856 by Abdülmecid I, sultan of the Ottoman Empire, as a gesture of thanks for British support in the Crimean War. The Koh-i-Noor became a part of the Crown Jewels when it was left to the Crown upon Victoria's death in 1901. It had been successively mounted in the crowns of Queen Alexandra and Queen Mary before it was transferred to The Queen Mother's Crown.