VIENNA, 28 January (Vienna Review ) -  United Nations Vienna today marked the International Day of Commemoration in memory of the victims of the Holocaust at a solemn ceremony organized by the United Nations Information Service (UNIS) Vienna. The ceremony held in the Vienna International Centre (VIC) brought together representatives of the public, especially the Jewish community, representatives of the Romanies and other affected groups. Ambassadors, senior officials, politicians, the diplomatic community, staff of the Vienna-based international organizations, students, civil society and non-governmental organizations were all represented. A key part of the event was the inauguration of an exhibition of a postcard series depicting life in a labour camp.