The Grand Duke was a supporter of the liberal (sometimes referred to as "enlightened") bureaucrats during the period of his brother
Alexander II's great reforms. He served as chairman of the
Imperial Russian Geographical Society (founded in 1845). The Geographical Society was subordinate to the Ministry of Internal Affairs, which was home to a conspicuous number of , including
Nikolai Miliutin. In The Hague in June 1841, 13-year-old Konstantin met the pianist
Anton Rubinstein during a performance for King William II. The two struck up a friendship, and Konstantin would become an important patron. In addition to his support of and participation in the 1861
emancipation of the serfs, the Grand Duke also instituted reforms in the
Imperial Russian Navy from 1854. Konstantin's brother, Alexander II of Russia was supposed to have said: "Let the Poles have their own court and intrigues." Though the Grand Duke tried to show a liberal attitude towards the Poles, his efforts came too late and he was recalled with the outbreak of the
January Uprising in 1863. == Marriage and issue ==