Emperor or Empress of India, was a title used by British monarchs from 1 May 1876 (with the Royal Titles Act 1876) to 22 June 1948, that was used to signify their rule over British India, as its imperial head of state. The image of the emperor or empress was used to signify British authority—his or her profile, for instance, appearing on currency, in government buildings, railway stations, courts, on statues etc. "God Save the King" (or, alternatively, "God Save the Queen") was the former national anthem of British India. Oaths of allegiance were made to the emperor or empress and the lawful successors by the governors-general, princes, governors, commissioners in India in events such as imperial durbars.