by Tipu Sultan overtook the Nawab of Bengal as the subcontinent's wealthiest monarchy; but this was short-lived and ended with the Anglo-Mysore War. The British then turned their sights on defeating the Marathas and Sikhs. In 1772, Governor-General Warren Hastings shifted administrative and judicial offices from Murshidabad to Calcutta, the capital of the newly formed Bengal Presidency, and the de facto capital of British India. The Nawabs had lost all independent authority since 1757. In 1858, the British government abolished the symbolic authority of the Mughal court. After 1880, the descendants of the Nawabs of Bengal were recognised simply as Nawabs of Murshidabad with the mere status of a peerage. History Independent nawabs The Bengal Subah was the wealthiest subah of the Mughal Empire. There were several posts under the Mughal administrative system of Bengal since Akbar's conquest in the 1500s. Nizamat (governornership) and diwani (premiership) were the two main branches of provincial government under the Mughals. The Subahdar was in-charge of the nizamat and had a chain of subordinate officials on the executive side, including diwans (prime ministers) responsible for revenue and legal affairs. The regional decentralization of the Mughal Empire led to the creation of numerous semi-independent strongholds in the Mughal provinces. As the Mughal Empire began to decline, the Nawabs rose in power. By the early 1700s, the Nawabs were practically independent, despite a nominal tribute to the Mughal court. The Mughal court heavily relied on Bengal for revenue. Azim-us-Shan, the Mughal viceroy of Bengal, had a bitter power struggle with his prime minister (diwan) Murshid Quli Khan. Emperor Aurangzeb transferred Azim-us-Shan out of Bengal as a result of the disputes. After the viceroy's exit, the provincial premier Murshid Quli Khan emerged as the de facto ruler of Bengal. His administrative coup merged the offices of the diwan (prime minister) and subedar (viceroy). In 1716, Khan shifted Bengal's capital from Dhaka to a new city named after himself. In 1717, Mughal Emperor Farrukhsiyar recognized Khan as the hereditary Nawab Nazim. The Nawab's jurisdiction covered districts in Bengal, Bihar, and Orissa. The Nawab's territory stretched from the border with Oudh in the west to the border with Arakan in the east. The chief deputy of the Nawab was the Naib Nazim of Dhaka, the mayor of the former provincial capital whose own wealth was considerable; the Naib Nazim of Dhaka also governed much of eastern Bengal. Other important