on 20 March 1820. Two months later, on 27 May, Konstantin married the Polish Countess Joanna Grudzińska, who was given the title of Her Serenity Princess of Lowicz. Connected with that, he renounced any claim to the Russian succession, which was formally completed in 1822. After the marriage, he became increasingly attached to his new home of Poland. Succession crisis and Decembrist Uprising When Alexander I died on 1 December 1825, Grand Duke Nicholas had Konstantin proclaimed emperor in Saint Petersburg. In Warsaw meanwhile, Konstantin abdicated the throne. When that became public knowledge, the Northern Society scrambled in secret meetings to convince regimental leaders not to swear allegiance to Nicholas. The efforts would culminate in the Decembrist revolt. Under Nicholas I, Konstantin maintained his position in Poland. Differences soon arose between him and his brother because of the part taken by the Poles in the Decembrist conspiracy. Konstantin hindered the unveiling of the organized plotting for independence, which had been going on in Poland for many years, and held obstinately to the belief that the army and the bureaucracy were loyally devoted to the Russian Empire. The eastern policy of the Tsar and the Turkish War in 1828 to 1829 caused a fresh breach between them. The opposition of Konstantin made the Polish army take no part in the war. Failed assassination and November uprising An assassination attempt was made on the life of Grand Duke Konstantin, which precipitated the November 1830 insurrection in Warsaw (the November Uprising). After the attempt on Konstantin's life, a secret court was set up to prosecute those who were responsible. "It was learned that Nicholas had ordered the Grand Duke Konstantin ... to start an energetic investigation and court-martial the culprits ... the committee at its session of 27 November decided irrevocably to start the revolution on the evening of the 29th, at 6pm." Like the assassination, the recruitment of army units by the rebels failed; only two units joined them, and only the capture of the armory and the subsequent arming of the populace kept the revolt alive. Konstantin saw the revolt as a strictly Polish affair and refused to use troops, as he could have, because it was foolish politically. He could trust his Russian troops, but to use them might be considered a violation of the kingdom's independence and even an act of war. Because of that setback, he was limited