Germany's president says the "inconceivable crimes" of the Holocaust require all Germans to act forever on behalf of Israel.

President Christian Wulff toured the Yad Vashem memorial in Jerusalem on Sunday. It marks his first visit to Israel since assuming the presidency in July.

The 51-year-old Wulff is the first German president to be born after World War II. The Nazis and their collaborators murdered 6 millions Jews during the war.

Wulff is being accompanied in Israel by his 17-year-old daughter, various diplomats and lawmakers. He will be meeting President Shimon Peres and other senior Israeli officials during his two-day visit. Then he will head to the West Bank, where he will meet Palestinian leaders and visit Jesus' traditional birthplace in Bethlehem.