The document describes the Forum Building, located in Barcelona, Spain. It notes that the architects Jacques Herzog and Pierre de Meuron, who were born in Switzerland and studied architecture together. Some of their notable projects include the Forum Building in Barcelona, the Philharmonic Hall in Hamburg, and the Beijing National Stadium. The Forum Building is triangular, measuring 180 meters on each side and 25 meters tall, and is located in the Diagonal Avenue area of Barcelona.