Following the 1857 revolt, the title of "Empress of India" was given to Queen Victoria in 1876 through the Royal Titles Act, and officially proclaimed in India in 1877.
On January 1, 1877, at Coronation Park in Delhi, British monarch Queen Victoria (1837-1901) assumed a new title: Kaiser-e Hind, Empress of India.
Kaiser-I-Hind means Empress of India was the Title given to Queen Victoria in the year 1877 in Delhi Durbar by Viceroy Lord Lytton (1876-1880).
This was made possible by passing the Royal Titles Act in 1876 In British Parliament.