Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The men's 400 metres was a track & field athletics event at the 1900 Summer Olympics in Paris. It was held on July 14, and July 15, 1900. The races were held on a track of 500 metres in circumference. 15 athletes from six nations competed. The 1900 Summer Olympics, today officially known as the Games of the II Olympiad, was an international multi-sport event which was celebrated in 1900 in Paris, France.