On 25 October 1711 at Torgau, Charlotte Christine married Tsarevich Alexei, eldest son and heir of Peter I of Russia by his first wife Eudoxia Lopukhina. She was allowed to keep her Lutheran faith, but any children would be raised as Russian Orthodox. This marriage was the second to break the old tradition of the Russian imperial family only marrying members of the Russian nobility, the first being Anna Ivanovna's marriage to Frederick William, Duke of Courland the year before. She was the first female member of a foreign European dynasty to marry a man of the Russian imperial family since Zoe Palaiologina. In 1713 she arrived in Russia.