After the fall of the Mughal Empire post 1857 revolt, the British Raj shifted the capital of British controlled territories in India to a less volatile city, Calcutta in Bengal, where it remained until 1911. After the announcement of the change, the British developed Lutyens' Delhi (in modern New Delhi) just south-west of Shahjahanabad. At this point, the older city started being called "Old" Delhi, as New Delhi became the seat of a national government. It was formally inaugurated as such in 1931.