Photo by C. E. de Hahn et Co., purveyor to the royal court. Tsarskoe Selo near St. Petersburg, 1909 23.7 х 17.6 cm Alexei Nikolaevich (1904-1918), grand duke and heir apparent to the throne of Russia, the only son of emperor Nicholas II. ALEXEI NIKOLAEVICH, Russian crown prince (Алексей Николаевич, цесаревич)