In 1770 the castle was taken by Russian forces. The Radziwill family was removed. The Lithuanian Archive was moved to Saint Petersburg (where it remains). The works of art in the palace were given to various Russian nobles. The Russian army left. The palace slowly fell into disrepair. It was restored by the Radziwills. Between 1881 and 1886 the castle's insides were fixed by Prince Anton Radizwill and his French wife, Marie de Castellane. They also made a landscape park in English style. With an area of more than one square kilometre, the park is one of the biggest in Europe.