Once every year in September, pyrotechnicians from countries all over Europe take over the Maifeld at the Berlin Olympic Stadium and present their craft. The well-practised teams create elaborate fireworks with breathtaking effects in the attempt to win the Pyronale trophy and the public's favor. A jury of experts and celebrities determine the champion of the Pyronale. The winning team receives the prize cup, a trophy created by German designer Jette Joop. On both Pyronale days, the audience can act as a jury too and vote for their favourite fireworks display of the evening. The competition includes an obligatory programme and a freestyle programme. For the obligatory part the teams have to create two shows, one with music and one without. The choice of colours for the display with music is left to the contestants, the colours for the one without is predetermined by the organisers. The freestyle part allows the teams to set up a show on their own.