Koestlin is a Croatian food company based in Bjelovar, specializing in confectionery products.Koestlin was founded in 1905 by Croatian Jewish industrialist Dragutin Wolf. In 1921 company began to produce biscuits and wafers. In 1932 Wolfs sons, Otto and Slavko Wolf agreed cooperation with Koestlin in Hungary, which was founded by Hungarian industrialist Lajos Koestlin at the end of 19th. century. Koestlin was nationalized after World War II by Yugoslav Communists.