The author shows the fortunes of the Teschner family which was active in Toruń for a short period of four generations only (1401-1524). Its progenitor Stephen came to Prussia from Świdnica. In the second and third generations members of the family baceme members of the municipal authorities. The sons of Stephen, Matthias and Martin, were very active merchants. Their trade contacts included Silesia, Masovia and Gdańsk. Shortly before the Thirteen Years’ War with the Teutonic Order the brothers were certainly the richest merchants in Toruń. They granted high loans to the city of Toruń and to the Prussian States which were to be paid by the Toruń City Council until the beginning of the 16th c. However, because of premature deaths of both brothers (Matthias and Martin), their wealth found its way to subsequent husbands of their widows. Only John, son of Martin, attained high offices in the city. His career was assisted by marrying Elizabeth Rackendorff and adopting her son Philip (born probably after the marriage with Elizabeth), whose natural father was Luke Watzenrode, later bishop of Warmia (Ermland). The career of John Teschner was also terminated by his premature death.