Walter Gropius' main achievement is the buildings of the Bauhaus, built in 1926. His pioneering architecture saw the birth of one of the most innovative schools of art of the 20th century.

These famous office buildings were designed and built between 1936 and 1939 for the wax manufacturer Johnson, by one one of the 20th century's greatest architects Frank Lloyd Wright.

A block of flats in Barcelona, the Casa Milà is an extraordinarily sculpted work created by the great Spanish architect Antoni Gaudi. The Art Nouveau apartments are expressionistic, fantastic, organic forms with undulating facades and roof lines.

Worried that their dynasty would disappear, the Nasrid sultans built this Red Castle in a strategic location over the city of Granada, ensuring that it became a paradise lost, dedicated to art, poetry and beauty.