The Koh-i-Noor diamond was given to the East India Company by the former rulers of Punjab in 1849. It became part of the British Crown Jewels when Queen Victoria was proclaimed Empress of India in 1877. It also contains the Lahore Diamond (22.48 carats) from the Treasury of Lahore given to Queen Victoria by the East India Company in 1851. and a 17-carat (3.4 g) diamond given to Queen Victoria by the Sultan of the Ottoman Empire in 1856. The crown is now on display along with the other British Crown Jewels in the Tower of London.