The famous clock that marks the beginning of the minute's silence is the Big Ben clock tower at the Palace of Westminster in London, England. This tradition began in 1919, after World War I, as a way to honor those who lost their lives in the war. Today, it is observed on Remembrance Day and other commemorative events as a way to honor and remember those who have died in service to their country. The minute's silence is also observed in many other countries around the world as a way to show respect and honor to those who have died.