Radziwiłł reports, it is unknown whether it was a real pregnancy or another intrigue. In September 1548, Sigismund Augustus invited Barbara to Poland to show the strength of their marriage. The issue was discussed by the general sejm on 31 October – 12 December in Piotrków Trybunalski. The sessions were loud and rowdy. The nobles, including voivodes Piotr Kmita Sobieński, Jan Gabriel Tęczyński, and Piotr Boratyński, pleaded the King to abandon the marriage and even threatened to take up arms. Sigismund Augustus steadfastly refused and stood by his wife; reportedly he even considered abdication. The sejm ended in a stalemate. After the sejm, Sigismund and Barbara entered Kraków on 13 February 1549. In Wawel, Barbara enjoyed a luxurious lifestyle and expensive gifts. In May 1549, she received large territories in the Trakai Voivodeship, including Kaunas Castle, Rumšiškės, Alytus, Merkinė, Nemunaitis, Birštonas, Žiežmariai, Stakliškės, Karmėlava, Vilkija, Skirsnemunė, Veliuona, Darsūniškis. While she had immense influence on Sigismund Augustus, she showed no interest in politics unlike her ambitious cousin Mikołaj "the Black" Radziwiłł and brother Mikołaj "the Red" Radziwiłł. While they worked with her husband to secure her the Polish crown, she made no gestures to win support from the nobles or favor from the people. When a compromise solution was offered – recognize Barbara as Sigismund Augustus' wife but not to crown her as Queen of Poland – Sigismund Augustus refused because that would cast a doubt on legitimacy of any future children. In summer 1549, to protect himself from a possible armed rebellion, Sigismund Augustus concluded an alliance with Ferdinand, King of Hungary, leaving his sister Isabella Jagiellon to fend for herself in the succession disputes in the Kingdom of Hungary. To obtain papal brief allowing Barbara's coronation, Sigismund Augustus issued an edict prohibiting heresy – a controversial move in a country that had many Eastern Orthodox believers in the east. He also worked to threaten, bribe, or otherwise persuade Polish nobles not to oppose the marriage. His mother and one of the most vocal opponents, dowager Queen Bona Sforza, was removed from the court and moved to Mazovia. Illness and death At the next sejm in May–July 1550, no one objected to the marriage. Therefore, while neither the sejm nor the senate gave an express permission, Barbara was crowned as Queen of Poland on 7 December 1550 in Wawel Cathedral by Mikołaj Dzierzgowski, Archbishop of Gniezno. However, her reign lasted