The location of Hiroshima Peace Memorial Park was once the city’s busiest downtown commercial and residential district. The park was built on an open field that was created by the explosion. Today there are a number of memorials and monuments, museums, and lecture halls, which draw over a million visitors annually. The annual 6 August Peace Memorial Ceremony, which is sponsored by the city of Hiroshima, is also held in the park. The purpose of the Peace Memorial Park is to not only memorialize the victims, but also to establish the memory of nuclear horrors and advocate world peace.