This paper provides a chronological overview of the data on the beginnings of public teaching in Sisak, on the first teachers and schools of that time from the 18th century. to the beginning of the 20th century with special reference to the work and influence of Antun Cuvaj. Therefore, the largest space is dedicated to the last quarter of the 19th century, when great changes took place in the history of Croatian education with the enactment of the first school law in 1874. When the military and civilian parts of the city are united in Sisak, the problem of arranging education intensifies. Public schools were united, and a civic school was founded (1875), the first of its kind in civil Croatia, in which the ten-year rule of Antun Cuvaj was of special significance. An apprenticeship school was founded (1886) and a music and associated women's vocational school (1895). The area of today's city of Sisak was in the past divided into Civil or Old Sisak (on the left bank of the Kupa) and Military or New Sisak (on the right bank of the Kupa). Schools existed on both sides of the Kupa, only operating under different laws, given the civilian and military political power. After the dissolution of the Military Sisak (1871) and the merger with the Civil Sisak into an independent city municipality (December 30, 1873) and the organization of the city council and government for the city of Sisak (March 31, 1874), the schools were united.