History of Spain. Madrid. Royal Palace. Extraordinary Embassy of the King of Annam to the King of Spain, on May 12, 1878. Alfonso XII received in public audience, in the Throne Room, the extraordinary ambassadors of the King of Annam. Antonio Maria Tho, priest of the congregation of the foreign missions and secretary interpreter of the embassy. Engraving depicting the ambassadors on their way to the Princess of Asturias' chambers, after the official reception. Drawing from life by Comba. Engraving by Ovejero. La Ilustracion Espanola y Americana, 1878.