Abraham-Louis Breguet (10 January 1747 – 17 September 1823), born in Neuchâtel, then a Prussian principality, was a horologist who made many innovations in the course of a career in watchmaking in France. In his lifetime he was considered the leading watchmaker of his day, and he built up a clientele that included many leading public figures and members of the European nobility. He is the founder of the Breguet company, which is now the luxury watch division of the Swiss Swatch Group.