On the western side of Kazansky Island on the bank of the River Moika on the southern side of Isaakievskaya Ploschad is another of St Petersburg's imperial palaces.  The Mariinsky Palace was built between 1839 and 1844 making it the newest of the imperial places in St Petersburg.  It was built on the orders of Emperor Nicholas I for his daughter Grand Duchess Maria Nikolaevna upon her marriage and was named in her honour.  Later the palace was used to house the State Council of Imperial Russia and the Committee of Ministers of Imperial Russia.  After the Revolution the palace continued to hold various ministries and since 1994 it has held St Petersburg's Legislative Assembly.  It is not usually open to the public.