An equestrian performs as the medieval knight, during the annual Knight Festival, which opened in the Spandau Zitadelle (Citadel in Berlin, March 30, 2013. A wide range of activities presenting the life and scene dating back to the European medieval times at the 3-da Knight Festival attracts many Berliners on outing during their Easter vacation. (Xinhua/Pan Xu)

A squad of equestrians perform as the medieval knights during the annual Knight Festival, which opened in the Spandau Zitadelle (Citadel) in Berlin, March 30, 2013. A wide range of activities presenting the life and scene dating back to the European medieval times at the 3-day Knight Festival attracts many Berliners on outing during their Easter vacation.(Xinhua/Pan Xu)

Female dancers perform dancing during the annual Knight Festival, which opened in the Spandau Zitadelle (Citadel) in Berlin, March 30, 2013. A wide range of activities presenting the life and scene dating back to the European medieval times at the 3-day Knight Festival attracts many Berliners on outing during their Easter vacation. (Xinhua/Pan Xu)

An equestrian performs as the medieval knight, during the annual Knight Festival, which opened in the Spandau Zitadelle (Citadel) in Berlin, March 30, 2013. A wide range of activities presenting the life and scene dating back to the European medieval times at the 3-day Knight Festival attracts many Berliners on outing during their Easter vacation. (Xinhua/Pan Xu)

A man shows his stunt of swallowing fire during the annual Knight Festival, which opened in the Spandau Zitadelle (Citadel) in Berlin, March 30, 2013. A wide range of activities presenting the life and scene dating back to the European medieval times at the 3-day Knight Festival attracts many Berliners on outing during their Easter vacation. (Xinhua/Pan Xu)

A performer throws his lance to prey on target on the galloping horse, during the annual Knight Festival, which opened in the Spandau Zitadelle (Citadel), in Berlin, March 30, 2013. A wide range of activities presenting the life and scene dating back to the European medieval times at the 3-day Knight Festival attracts many Berliners on outing during their Easter vacation. (Xinhua/Pan Xu)

A performer throws his lance to prey on target on the galloping horse during the annual Knight Festival, which opened in the Spandau Zitadelle (Citadel), in Berlin, March 30, 2013. A wide range of activities presenting the life and scene dating back to the European medieval times at the 3-day Knight Festival attracts many Berliners on outing during their Easter vacation. (Xinhua/Pan Xu)

A man performs archery during the annual Knight Festival, which opened in the Spandau Zitadelle (Citadel) in Berlin, March 30, 2013. A wide range of activities presenting the life and scene dating back to the European medieval times at the 3-day Knight Festival attracts many Berliners on outing during their Easter vacation. (Xinhua/Pan Xu)

A man shows his stunt with fire during the annual Knight Festival, which opened in the Spandau Zitadelle (Citadel) in Berlin, March 30, 2013. A wide range of activities presenting the life and scene dating back to the European medieval times at the 3-day Knight Festival attracts many Berliners on outing during their Easter vacation. (Xinhua/Pan Xu)

An equestrian performs as the medieval knight during the annual Knight Festival, which opened in the Spandau Zitadelle (Citadel) in Berlin, March 30, 2013. A wide range of activities presenting the life and scene dating back to the European medieval times at the 3-day Knight Festival attracts many Berliners on outing during their Easter vacation. (Xinhua/Pan Xu)