Only 1 naturalised Indian has won Bharat Ratna so far
Mother Teresa was the first, and the only person till date, to be awarded India's highest civilian honour Bharat Ratna as a 'naturalised' citizen. Mother Teresa was born on 26 August, 1910 in the modern-day Macedonia, but lived majority of her life in India. A person needs to be resident of India for 12 years to acquire citizenship by naturalisation.