Who gave Kohinoor to the British?

Following the end of the second Anglo-Sikh War in 1849, the Kohinoor was given by Duleep Singh to Lord Dalhousie as part of the treaty of Lahore. From there, the East India Company agents prepared the Koh-i-Noor for shipment to the British court.

Since then it has become part of the royal crown jewels. Currently it adorns the crown worn by the reigning monarch of the British Isles, Queen Elizabeth II.

For further reading check the following articles:

• First Anglo-Sikh War
• Second Anglo-Sikh War
• British Raj