Regnans in Excelsis is a papal bull that Pope Pius V issued on 25 February 1570. It excommunicated Queen Elizabeth I of England, referring to her as "the pretended Queen of England and the servant of
The Ridolfi plot was a Catholic plot in 1571 to overthrow Queen Elizabeth I of England and replace her with Mary, Queen of Scots. The plot was hatched and planned by Roberto Ridolfi, an international
The Ridolfi plot was meant to put Mary Stuart on the throne of England.