David Rizzio, sometimes written as David Riccio or David Rizzo (c. 1533 – 9 March 1566), was an Italian courtier, born close to Turin, a descendant of an ancient and noble family still living in Piedmont, the Riccio Counts di San Paolo e Solbrito, who rose to become the private secretary of Mary, Queen of Scots. Mary's husband, Lord Darnley, is said to have been jealous of their friendship, because of rumours that he had impregnated Mary, and joined in a conspiracy of Protestant nobles, led by Patrick Ruthven, 3rd Lord Ruthven, to murder him. The murder was the catalyst for the downfall of Darnley, and it had serious consequences for Mary's subsequent career. Mary was having dinner with Riccio and a few ladies in waiting when Darnley joined them, accusing his wife of Adultery and then having someone murder Riccio, who was hiding behind Mary. Mary was held at gunpoint and Riccio was stabbed several times. His body had over 50 wounds.
Rizzio (whose name appears in Italian records as David Riccio di Pancalieri in Piemonte) went first from Turin to the Court of the Duke of Savoy, then at Nice. However, finding no opportunities for advancement there, he found means to get himself admitted into the train of the Count de Moretto in 1561, who was about to lead an embassy to Scotland. The Court in Scotland had no employment for Rizzio, and dismissed him. He ingratiated himself with the Queen's musicians, whom she had brought with her from France. James Melville, a personal friend of Rizzio, said that "Her Majesty had three valets in her chamber, who sung three parts, and wanted a bass to sing the fourth part". Thus, he was drawn into her court (Hawkins, 1778).
He was considered a good musician, and an excellent singer, which first brought him to the attention of the cosmopolitan young Queen. Towards the end of 1564, having grown wealthy under her patronage, he became the Queen's secretary for relations with France, after the previous occupant of the post retired there. This post attracted a quarterly salary of £20. Ambitious (seeing himself as all but a Secretary of State), a Catholic and a foreigner to boot, Rizzio, it was felt, was too close to the Queen. Rumours became rife that Mary was having an adulterous affair with Rizzio.