Medieval archers compete during the Medieval Festival "Tall Hermann" in Narva, Estonia, June 25, 2016. Medieval Festival "Tall Hermann" was held at Narva Castle in northeastern Estonia. During the festival all visitors were involved to the medieval atmosphere in the Narva Castle. (Xinhua/Sergei Stepanov)

Teutonic knights fight during the Medieval Festival "Tall Hermann" in Narva, Estonia, June 25, 2016. Medieval Festival "Tall Hermann" was held at Narva Castle in northeastern Estonia. During the festival all visitors were involved to the medieval atmosphere in the Narva Castle. (Xinhua/Sergei Stepanov)

A woman in medieval dress dances with a flag during the Medieval Festival "Tall Hermann" in Narva, Estonia, June 25, 2016. Medieval Festival "Tall Hermann" was held at Narva Castle in northeastern Estonia. During the festival all visitors were involved to the medieval atmosphere in the Narva Castle. (Xinhua/Sergei Stepanov)

Medieval archers compete during the Medieval Festival "Tall Hermann" in Narva, Estonia, June 25, 2016. Medieval Festival "Tall Hermann" was held at Narva Castle in northeastern Estonia. During the festival all visitors were involved to the medieval atmosphere in the Narva Castle. (Xinhua/Sergei Stepanov)

Teutonic knights fight during the Medieval Festival "Tall Hermann" in Narva, Estonia, June 25, 2016. Medieval Festival "Tall Hermann" was held at Narva Castle in northeastern Estonia. During the festival all visitors were involved to the medieval atmosphere in the Narva Castle. (Xinhua/Sergei Stepanov)

People in medieval dress participate in the Medieval Festival "Tall Hermann" in Narva, Estonia, June 25, 2016. Medieval Festival "Tall Hermann" was held at Narva Castle in northeastern Estonia. During the festival all visitors were involved to the medieval atmosphere in the Narva Castle. (Xinhua/Sergei Stepanov)