Please answer the following question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Celebrators of Becoming - Celebrators of Becoming is a Therion box-set released on 5 May 2006. It contains 4 DVDs and 2 audio discs. It is available in two versions: The luxury digipak version in a slip case and the cheaper non-digipak version. Both versions contain all discs. Cover artwork was made by Thomas Ewerhard.
Answer:
Album