Despite the Imperial Household Agency's disapproval of Masako, and her attending Balliol College, Oxford, for the next two years, Naruhito remained interested in Masako. He would go on to propose to her three times before the Imperial Palace announced their engagement on 19 January 1993. The wedding took place on 9 June the same year at the Imperial Shinto Hall in Tokyo before 800 invited guests, including many of Europe's heads of state and royalty, and an estimated media audience of 500 million people around the world.