Nicholas was named Grand Prior of Russia and entitled to wear the Maltese cross. Nicholas grew up to be a fine young man. Riasanovsky says of him that he is "the most handsome man in Europe, but also a charmer who enjoyed feminine company and was often at his best with the men." On 13 July 1817, Nicholas married Princess Charlotte of Prussia (1798–1860), who took the name Alexandra Feodorovna when she converted to Orthodoxy. Charlotte's parents were Frederick William III of Prussia and Louise of Mecklenburg-Strelitz. Nicholas and Charlotte were third cousins, as they were both great-great-grandchildren of Frederick William I of Prussia. With two older brothers, it initially seemed unlikely Nicholas would ever become Tsar. By and by, as Alexander and Constantine both failed to produce legitimate sons, Nicholas first came to attention as being likely to rule one day, or at least that his children may succeed. In 1825, when Alexander I died suddenly of typhus, Nicholas was caught between swearing allegiance to Constantine and accepting the throne for himself. The interregnum lasted until Constantine, who was in Warsaw at that time, confirmed his refusal. Additionally, on 25 (13 Old Style) December, Nicholas issued the manifesto proclaiming his accession to the throne. That manifesto retroactively named 1 December (19 November Old Style), the date of Alexander I's death, as the beginning of his reign. During this confusion, a plot was hatched by some members of the military to overthrow Nicholas and seize power. This led to the Decembrist Revolt on 26 (14 Old Style) December 1825, an uprising Nicholas was successful in quickly suppressing. Emperor and principles Early reign Nicholas completely lacked his brother's spiritual and intellectual breadth; he saw his role simply as that of a paternal autocrat ruling his people by whatever means necessary. Nicholas I began his reign on 14 December 1825 (old style), which fell on a Monday; Russian superstition held that Mondays were unlucky days. This particular Monday dawned very cold, with temperatures of −8 degrees Celsius. This was regarded by the Russian people as a bad omen for the coming reign. The accession of Nicholas I was marred by a demonstration of 3000 young Imperial Army officers and other liberal-minded citizens. This demonstration was an attempt to force the government to accept a constitution and a representative form of government. Nicholas ordered the army out to smash the demonstration. The "uprising"