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. Torre Nova Diagonal -  Torre Nova Diagonal is a skyscraper in Barcelona Catalonia Spain. Completed in 2007 has 22 floors and rises 86 meters.
A:
Building