Toru?, Poland: Home of Copernicus The city of Toru?, Poland, traces its origins back to the mid-thirteenth century, when Teutonic Knights built a castle on the site as a base for the conquest and evangelization of Prussia. The city later developed a commercial role as part of the Hanseatic League, a medieval trade alliance among cities in medieval Northern Europe. Fourteenth- and fifteenth-century structures, including the house of Copernicus, remain standing throughout the city.
