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. Museo de Escultura al Aire Libre de Alcalá de Henares -  The Museum of Outdoor Sculpture of Alcala de Henares (Museo de Escultura al Aire Libre de Alcalá de Henares) is a permanent exhibition of contemporary art in public Alcalá de Henares (Madrid - Spain) opened in 1993 and organized by the sculptor José Noja.
Answer:
Building