Roger Joseph Boscovich (, , ) (see also names in other languages); 18 May 1711 – 13 February 1787) was a Ragusan physicist, astronomer, mathematician, philosopher, diplomat, poet, theologian, Jesuit priest, and a polymath from the city of Dubrovnik in the Republic of Ragusa (modern-day Croatia), who studied and lived in Italy and France where he also published many of his works.