Participants demonstrate for the media before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. Harry Potter enthusiasts from all over the world are attending a four-day live action role play event at the medieval castle made into a close imitation of the “College of Wizardry”. (Photo by Kacper Pempel/Reuters)

A participant walks in front of the castle before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Participants chat as they walk in front of the castle before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Participants demonstrate for the media before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Participants demonstrate for the media before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Participants chat as they wait for the beginning of the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Participants walk as they wait for the beginning of the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

General view of Czocha Castle during the role play event in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Participants smile as they take part in workshop before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Jars with “magical ingredients” are seen before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Participants listen to instructions as they attend a workshop before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Participants gather in front of the castle before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

A participant walks in front of the castle before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

A participant draws on his “secret book” during a workshop before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

A participant walks near a castle defense wall before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Participants talk in front of the castle before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Participants react as they listen to instructions during a workshop before role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

A participant smiles as he walks in front of the castle before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Stine Nielsen from Denmark smiles after arriving for the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

A man pose as he arrived for the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

Women prepare their costumes before taking part in the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

A group of participants listen to instructions during a workshop before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

A participant looks on during a workshop before the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)

A participant smiles as he waits for the beginning of the role play event at Czocha Castle in Sucha, west southern Poland April 9, 2015. (Photo by Kacper Pempel/Reuters)