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Tsarevich

On 1 March 1881, following the assassination of his grandfather, Tsar Alexander II, Nicholas became heir apparent or tsarevich upon his father's accession as Alexander III. Nicholas and his other family members bore witness to Alexander II's death, having been present at the Winter Palace in Saint Petersburg, where he was brought after the attack. For security reasons, the new Tsar and his family relocated their primary residence to the Gatchina Palace outside the city, only entering the capital for various ceremonial functions. On such occasions, Alexander III and his family occupied the nearby Anichkov Palace.

In 1884, Nicholas's coming-of-age ceremony was held at the Winter Palace, where he pledged his loyalty to his father. Later that year, Nicholas's uncle, Grand Duke Sergei Alexandrovich, married Princess Elizabeth, daughter of Louis IV, Grand Duke of Hesse, and his late wife Princess Alice of the United Kingdom (who had died in 1878), and a granddaughter of Queen Victoria. At the wedding in St. Petersburg, the sixteen-year-old Tsarevich met with and admired the bride's youngest surviving sister, twelve-year-old Princess Alix. Those feelings of admiration blossomed into love following her visit to St. Petersburg five years later in 1889. Alix had feelings for him in turn. As a devout Lutheran, she was initially reluctant to convert to Russian Orthodoxy to marry Nicholas, but later relented.

In 1890 Nicholas, his younger brother George, and their cousin Prince George of Greece, set out on a world tour, although Grand Duke George fell ill and was sent home partway through the trip. Nicholas visited Egypt, India, Singapore, and Siam (Thailand), receiving honors as a distinguished guest in each country. During his trip through Japan, Nicholas had a large dragon tattooed on his right forearm by Japanese tattoo artist Hori Chyo. His cousin George V of the United Kingdom had also received a dragon tattoo from Hori in Yokohama years before. It was during his visit to Otsu, that Tsuda Sanzō, one of his escorting policemen, swung at the Tsarevich's face with a sabre, an event known as the Ōtsu incident. Nicholas was left with a 9 centimeter long scar on the right side of his forehead, but his wound was not life-threatening. The incident cut his trip short. Returning overland to St. Petersburg, he was present at the ceremonies in Vladivostok commemorating the beginning of work on the Trans-Siberian Railway. In 1893, Nicholas traveled to London on behalf of his parents to be present at the wedding of his cousin the Duke of York to Princess Mary of Teck. Queen Victoria was struck by the physical resemblance between the two cousins, and their appearances confused some at the wedding. During this time, Nicholas had an affair with St. Petersburg ballerina Mathilde Kschessinska.

Though Nicholas was heir-apparent to the throne, his father failed to prepare him for his future role as Tsar. He attended meetings of the State Council; however, as his father was only in his forties, it was expected that it would be many years before Nicholas succeeded to the throne. Sergei Witte, Russia's finance minister, saw things differently and suggested to the Tsar that Nicholas be appointed to the Siberian Railway Committee. Alexander argued that Nicholas was not mature enough to take on serious responsibilities, having once stated "Nikki is a good boy, but he has a poet's soul...God help him!" Witte stated that if Nicholas was not introduced to state affairs, he would never be ready to understand them. Alexander's assumptions that he would live a long life and had years to prepare Nicholas for becoming Tsar proved wrong, as by 1894, Alexander's health was failing.