The problems described in the article are the following: rents paid by bourgeoisies ; the duties of craftsmen, fishermen and millers towards the owner or the state, tributes for the Order of Benedictines ), Tykocin citizens’ duties for repairing bridges, maintaining cleanliness in the town, repairing cobbled pavements and strengthening channels on the Motława River. Some duties of Jews from Tykocin towards the magistrate and the Roman Catholic Church were also discussed. Moreover the issue of subsidium charitativum [a voluntary tax] of the parish in Tykocin towards the state and the particular duty of missionaries conducting seminars and the parish school, were described. The duties of small group from Tykocin hospital in the 18th century were described as well.