Yad Vashem (Hebrew: יד ושם; "Holocaust Martyrs' and Heroes' Remembrance Authority") is Israel's official memorial to the victims of the Holocaust established in Jerusalem in 1953 through the Memorial Law passed by the Knesset, Israel's parliament. The new Holocaust History Museum (shown above) was built as a prism-like triangular structure. It is 180 meters long, with stark walls made from reinforced concrete. The museum covers an area of more than 4,000 square meters and is mostly situated below ground level.