Historical Events Mar 9 David Rizzio, the private secretary to Mary I of Scotland, is murdered in the Palace of Holyroodhouse, Edinburgh, Scotland Mar 28 Foundation stone laid for the new city of La Valletta in Malta by Knights Hospitaller Grand Master Jean de Valette Events in 1566 Famous Deaths Mar 9 David Rizzio, Italian secretary of Mary Queen of Scots, murdered by Protestant nobles Mar 26 Antonio de Cabezón, Spanish blind organist and composer, dies at 55 Mar 28 Siegmund Freiherr von Herberstein, Austrian diplomat, dies at 79 Feb 1566 History by Year Apr 1566 Historical Figures Authors Civil Rights Activists Inventors Kings Revolutionaries Scientists