He also wrote a number of books (handbooks, essays and fictional works), a theatre play, and a couple of radio plays. Another significant difference between then and now is that group winners faced the same number of matches as the runners up. Brera is widely credited for innovating Italian language, notably by creating a whole new terms for football (soccer), some of which have been adopted by other countries. Milan has had numerous presidents over the course of its history, soccer jerseys some of whom have been owners of the club while others have been honorary presidents. In 2003, the monumental Arena Civica (stadium), built in Milan by Napoleon I of France in the early 19th century, was renamed Arena Gianni Brera.