<Ul> <Li> The Kongresshalle, or "Congress Hall", (1935, unfinished) at the Nazi Party Rally grounds, Nuremberg, Germany </Li> <Li> The Summer Olympic Games medal from 1928 to 2000, designed by Giuseppe Cassioli, features a depiction of the Colosseum . At the 2004 Summer Olympics in Athens the Colosseum was replaced by a depiction of the Panathinaiko Stadium </Li> <Li> The exterior of the Vancouver Public Library in British Columbia resembles the current state of the Colosseum . It was designed by Moshe Safdie . </Li> <Li> The Los Angeles Memorial Coliseum entrance was inspired by the Colosseum . </Li> <Li> The Palazzo della Civilta Italiana was very closely modelled on the Colosseum . It was built for Mussolini for the Universal Exhibition of 1942 but the exhibition never happened due to the outbreak of World War II . The architects were Giovanni Guerrini, Ernesto Bruno La Padula, and Mario Romano . </Li> <Li> McCaig's Tower, overlooking Oban, Scotland . </Li> </Ul> <Li> The Kongresshalle, or "Congress Hall", (1935, unfinished) at the Nazi Party Rally grounds, Nuremberg, Germany </Li> <Li> The Summer Olympic Games medal from 1928 to 2000, designed by Giuseppe Cassioli, features a depiction of the Colosseum . At the 2004 Summer Olympics in Athens the Colosseum was replaced by a depiction of the Panathinaiko Stadium </Li> <Li> The exterior of the Vancouver Public Library in British Columbia resembles the current state of the Colosseum . It was designed by Moshe Safdie . </Li>

When did the floor of the colosseum collapse