Year 1669 (MDCLXIX) was a common year starting on Tuesday (link will display the full calendar) of the Gregorian calendar and a common year starting on Friday of the 10-day slower Julian calendar.

Alessandro Marcello (24 August 1669 – 19 June 1747) was an Italian nobleman, poet, philosopher, mathematician and musician.

A contemporary of Tomaso Albinoni, Marcello was the son of a senator in Venice. As such, he enjoyed a comfortable life that gave him the scope to pursue his interest in music. He held concerts in his hometown and also composed and published several sets of concertos, including six concertos under the title of La Cetra (The Lyre), as well as cantatas, arias, canzonets, and violin sonatas. Marcello, being a slightly older contemporary of Antonio Vivaldi, often composed under the pseudonym Eterio Stinfalico, his name as a member of the celebrated Arcadian Academy (Pontificia Accademia degli Arcadi). He died in Padua in 1747.

Alessandro's brother was Benedetto Marcello, also a composer, who illegally married his singing student Rosanna Scalfi in 1728. After his death she was unable to inherit his estate, and in 1742 she filed suit against Alessandro Marcello, seeking financial support.

Christopher Simpson (b. between 1602 and 1606; d. 1669) was an English musician and composer, particularly associated with music for the viola da gamba.

Simpson was born between 1602 and 1606, probably at Egton, Yorkshire. He was the eldest son of Christopher Sympson, a Yorkshireman, who is usually described as a cordwainer but who was also the manager of a theatre company patronised by wealthy Yorkshire Catholics. It is thought that Sympson senior may have preferred to portray himself at times as a simple craftsman, rather than a high-profile Catholic sympathiser, at a time when Catholics were persecuted in England. There is a theory (put forward by Urquart) that Christopher Simpson (junior), the musician, could have been the same Simpson (or Sampson) who was educated as a Jesuit in continental Europe and was ordained as a catholic priest in 1629. However, Simpson's death in 1669 is at odds with the evidence that the Jesuit Simpson lived until 1674.

Simpson fought in the English Civil War, on the Royalist side and, in 1642, was a quarter-master in the army of the Earl (later Duke) of Newcastle. Following the siege of York, Simpson took refuge at the manor of Sir Robert Bolles (1619–1663), at Scampton, Lincolnshire, where Bolles employed him as a resident musician and tutor to his son John.