At Miramar Castle in Trieste, Austria, Archduke Maximilian officially accepts the imperial throne of Mexico
With great ceremony at Mirimar Castle near Trieste, Austrian Archduke Maximilian and his wife, Archduchess Carlotta, received at noon a large Mexican delegation led by Gutierrez de Estrada. The group offered officially the throne of Mexico. Maximilian had accepted in principle the previous October but now formally swore his oath to serve the people of Mexico. His reign lasted until June 1867 when Mexican revolutionaries under Benito Juarez deposed and executed him. (By John Osborne)
Frederic Hall, Life of Maximilian I, Late Emperor of Mexico, with a sketch of the Empress Carlotta (New York: James Miller, 1868), 81-83.