Maharaja Gulab Singh Jamwal (1792–1857) was the founder of royal Dogra dynasty and first Maharaja of the princely state of Jammu and Kashmir, the second largest princely state in British India, which was created after the defeat of the Sikh Empire in the First Anglo-Sikh War. During First Anglo-Sikh War Gulab Singh joined hands with British and betrayed Sikhs by leaking secret information of Sikh army. The Treaty of Amritsar (1846) formalised the sale by the British to Gulab Singh for 7,500,000 Nanakshahee Rupees of all the lands in Kashmir that were ceded to them by the Sikhs by the Treaty of Lahore.