 After the 24 games, Cologne went on to become a famous football and rugby stadium. For years, it was France's answer to Wembley. And now, today, it's back as an Olympic venue for hockey. Sports historian Michael Delapine. So many great names have run and kicked and tackled in this ground. It's a place that's full of the ghosts of athletes. You can almost see them and hear them. It really is a holy place of sport.