Konstantinas Sirvydas

Konstantinas Sirvydas (rarely referred as Konstantinas Širvydas; Latin: Constantinus Szyrwid; Polish: Konstanty Szyrwid; c. 1579 – August 23, 1631) was a Lithuanian religious preacher, lexicographer, and one of the pioneers of Lithuanian literature from the Grand Duchy of Lithuania, at the time a confederal part of the Polish-Lithuanian Commonwealth. He was a Jesuit priest, a professor at the Academia Vilnensis, and the author of, among other works, the first grammar of the Lithuanian language and the first trilingual dictionary in Lithuanian, Latin, and Polish (1619). Famous for his eloquence, Sirvydas spent 10 years of his life preaching sermons at St. Johns' Church in Vilnius (twice a day – once in Lithuanian and once in Polish).