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Dwarves and fire demons light up religious festival in Catalonia

David Ramos / Getty Images

Revelers surround the "Nans Vells" - "old dwarves" in Catalan - during the first day of the Patum festival in Berga, Catalonia, Spain, on May 30, 2013.

David Ramos / Getty Images

Firecrackers explode as revelers take part in the dance of the 'Plens' - fire demons - during the first day of the Patum festival.

Revelers were greeted by the sight of papier mâché horses, fire demons, dragons and giant-headed dwarves on the streets of Berga, a city in Spain's Catalonia region, on Thursday night.

The Patum festival, which takes place each year during the week of Corpus Christi, has its roots in the theatrical performances of the Middle Ages, Getty Images reports. 

In 2005, the event was recognized as part of "the intangible cultural heritage of humanity" by UNESCO.

David Ramos / Getty Images

David Ramos / Getty Images

Revelers hold maces with firecrackers as they dance during the first day of the festival.

David Ramos / Getty Images

Revelers gather around the "Nans Vells".

See more images of Corpus Christi celebrations on PhotoBlog.