Август III
King Casimir IV of Poland by virtue of privileges of 1476 and 1484, established two annual fairs and a weekly market. Among the main activities of the population were crafts, pottery, brewing and agriculture. In the 17th and early 18th century Koronowo suffered due to Swedish invasions, the Great Northern War and epidemics. King Augustus III of Poland established two more annual fairs to help revive the town.