Rome’s Birthday is celebrated on April 21. According to legend Romulus founded the city on this day. For several years, one of the most striking commemorative events has been organized by Gruppo Storico Romano, an association that promotes cultural initiatives on Ancient Rome. Dozens of costumed groups from all over Italy and Europe parade through the city, wearing reproductions of ancient clothes, helmets and armours. The event also includes performances of dancers and gladiator fights and always attracts a large audience. In 2015 the historical re-enactment was held on April 19th, Sunday, because the 21st was a working day.