This study deals with life and activities of the last four Princes Collalto e San Salvatore who owned the Moravian family estates between 1854 and 1945. On the basis of preserved archive materials, it provides a biographical overview of their lives, family situation and of their activities connected with Moravian estates during the end of Austria-Hungary, First Czechoslovak Republic and post-war Czechoslovakia.
Among these four Collaltos, Emanuel Josef (1854-1924) is the central figure, though, to understand the stagnation of the House of Collalto under its four last Princes, attention is also paid to Emanuel's father Eduard and his two successors: Manfred and Octavian.