Alexander I, the 13th Tsar of Russia from the Romanov dynasty, is often referred to as the 'Mysterious Tsar.' His brief reign was filled with unresolved enigmas. Alexander I's father, Paul I, was the son of Catherine the Great, who had a notably cold relationship with him. She secretly designated Alexander as her heir, but Paul I discovered the decree before his death and burned it. Ultimately, Alexander ascended to the throne, yet the controversy surrounding his involvement in his father's murder and usurpation continues to this day. During his reign, Alexander attempted to reverse his father's policies but failed to win the people's favor.