to treat them as members of the Polish–Lithuanian Commonwealth and so the nobles would enjoy the same rights and opportunities as the Polish nobles if they decided to leave for Poland. Implementation Prussia The treaty first met with the protest of the Prussian estates, which feared a loss of privileges. As a leader of the opposition, Königsberg mayor Hieronymus Roth was incarcerated for 16 years until his death. The estates' protests ended in 1663, when they swore allegiance to Frederick William I. The ecclesiastical subordination of the Roman Catholic Church to the Polish Royal Prussian prince-bishop of Ermland (Warmia) also caused tensions with the House of Hohenzollern. Despite those problems, sovereignty in the Prussian duchy provided the basis for the Brandenburgian Hohenzollern to crown themselves "King in Prussia" in 1701. Lauenburg and Bütow Land Lauenburg and Bütow Land was officially handed over by John II Casimir's envoy Ignatz Bokowski and received by the Brandenburg-Prussian envoys Adam von Podewils and Ulrich Gottfried von Somnitz in April 1658. During the ceremony, the non-noble inhabitants swore the same oath of allegiance to the Brandenburgian electors that had been sworn to the Pomeranian dukes, and the nobles swore a modified oath. The oath was given by 63 noble families from the Lauenburg district and 43 families of the Bütow district, which was represented at the ceremony by 220 persons. Three persons swore in Polish. The Brandenburg-Prussian administration did not accept all of the families as nobles since in May, only thirteen indigenous and six immigrated Pomeranian families in the Lauenburg district and four families in the Bütow district were listed as nobles, the others being referred to as besondere freye Leute ("special free persons"). The Brandenburgian electors amended their title with dominus de Lauenburg et Bytaw, despite Polish protests aimed at a change from dominus (lord) to fiduciarus (fiduciary). Until 1771, Lauenburg and Bütow Land was administered from Lauenburg (now Lebork), where the local Oberhauptmann had his seat; the nobles swore allegiance to the electors; and assemblies of the nobles were held in a landtag, the Seymik. After 1771, the region was governed from Stettin (now Szczecin), like the rest of Brandenburgian Pomerania, and allegiance to subsequent Prussian kings was given with the other Pomeranian estates in Stettin. The provision that Brandenburgian envoys were to be sent to the inauguration of subsequent Polish kings was followed until 1698, when Brandenburg-Prussia ceased to send delegations.