The size of the Dohany Street Synagogue, which opened in 1659, reflects the importance of the capital's Jewish population at the time. Built in four years to Moorish-style plans by German architect Ludwig Förster, the synagogue is the largest in Europe and the second largest in the world, and its surroundings include a museum, archives, and memorial to the 10,000 Hungarian Jews who went missing Their lives in World War I, as well as a garden that was used as a cemetery for the victims of the Holocaust.