Marienburg Schloss was the summer residence of King George V of Hannover (1819-1878), grandson of King George III of The United Kingdom, and his wife, Princess Marie of Saxe-Altenburg (1818-1907).
Three Imperial Porcelain mirrors, made to the design of Aleksandr Novikov (b. 1793), are recorded, one in 1845, made for the Imperial Palace at Tsarskoe Selo, another made in 1847, for Peterhof, which remains in the Peterhof Collection. The third mirror, produced in 1855 was probably the present example. Woolf suggests this was a gift to 'Princess of the Netherlands', probably Wilhelmina Marie Sophie (1824-1897), grand-daughter of Paul I and Maria Feodorovna, who married Karl, Grand Duke of Saxe-Weimar-Eisenach (1818-1901).
(see N. Woolf, The Imperial Porcelain Factory 1744-1904, St. Petersburg, 2003 edition, p. 205 and colour illustration.)
The moulded flowers produced by the Imperial Porcelain Factory were considered to be of the highest quality, much admired by those at the Sèvres Porcelain Works. See also an Imperial Porcelain vase with similar exquisite floral moulded decoration and a similar mirror from the period of Nicholas I.
(A. K. Lanceray, Russian Porcelain The art of the First Russian Porcelain Factory, Leningrad, 1968, p.25, pl. 150-151 and 168.)