For centuries Delhi had been the capital of the Mughal Empire from Babur to successors of Aurangzeb and previous Turkic Muslim rulers of North India. The series of Islamic rulers keeping Delhi as a stronghold of their empires left a vast array of Islamic architecture in Delhi, and a strong Islamic culture permeated the city. In 1911, when the British Raj shifted their colonial capital from Calcutta to Delhi, the nature of the city began slightly changing. The core of the city was called ‘Lutyens’ Delhi’ named after the British architect Edwin Lutyens, and was designed to service the needs of the small, but growing population of the British elite gentry. Nevertheless, in the 1941 Census listed Delhi's population as being 33.2% Muslim.