The Jewish Museum in Berlin, by Daniel Libeskind, tackles the emptiness left by the extermination of Europe's Jews during the Second World War. His response is an architecture of absence.

The Garnier Opera by Charles Garnier This is Paris's most prestigious 19th century building, the pinnacle of the "Beaux Arts" style with its ornamented facade, transfigured by the excesses of a theatre-mad architect in the mid-1800s.

With the Convent of La Tourette, commissioned by the Dominicans of Lyons, Le Courbusier was charged with the task of creating this rural convent retreat. A reinvention of religious architecture, its rough concrete form houses one hundred sleeping rooms plus recreational spaces.

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.

At the end of the 19th century, Louis Henry Sullivan, the father of American architecture, built the world's largest opera house, a "democratic" auditorium which was revolutionary in its very conception.

Built in 1952 by Alvaar Alto, this town hall building lies in the heart of a rugged landscape in Finland. It represents a humanist masterpiece, and pays modern homage to the Ideal City of the Italian Renaissance.