Duchy of Nysa
Paczków was officially founded and granted town rights on March 8, 1254, when the Polish Bishop of Wrocław, Tomasz I gave permission to two Flemings Henryk and Wilhelm, for the location of a new town Bogunów (mentioned under the Latinized name "Bogunov") to be settled by German immigrants. The new town was placed near the ancient village of Paczków and took its name, and henceforth, the name of the village was changed to Stary Paczków ("Old Paczków"). The name Paczków itself comes from the Old Polish male name Pakosław. Paczków, mentioned in medieval documents under the Latinized Old Polish names "Paczkaw" ("Liber fundationis episcopatus Vratislaviensis") and "Patzkow" ("Book of Henryków"), quickly grew, becoming not only a market town, but also a stronghold, guarding southwestern borders of the ecclesiastical Duchy of Nysa of fragmented Poland. It was granted the so-called Flemish rights, based on Magdeburg rights. The new town received several privileges, such as the right to brew beer, and its early inhabitants were mostly craftsmen, such as bakers, butchers and shoemakers.