The Alan Parsons Project music can be defined as mainly rock. They create concept albums revolving around different ideas or people, such as Edgar Allan Poe, and for this particular concept album Antonio Gaudi served as the inspiration. Gaudi was a Spanish modernist architect whose buildings still stand as monuments of his genius. Among his very impressive work is La Sagrada Familia Cathedral in Barcelona, which is considered his masterpiece even though it remains unfinished. Several musicians and singers contribute to the Project’s vision.