With the concept of the German pavilion at the World Expo in 1929, Mies van der Rohe gained international reputation. The furniture exhibited in Barcelona is still considered as unrivaled design classics of the 20th century. Its architectural style was a bold response to the request of his time. He developed a philosophical design concept that renewed the creative possibilities of space and material in a revolutionary way to establish an aligned in a rational and functional logic design in the 1920s. The seating furniture which was exposed in Barcelona in 1929 was named after the place of the exhibition. In addition to the armchair, the two-seater, three-seater and the associated lounger and the Ottomans emerged. They are the result of the designer's imagination of modern designs and stand for timeless, imperishable elegance. The first buyers were the industrialist couple Fritz and Greta Tugendhat who used the Barcelona chair in their Villa Tugendhat in Bruenn, which was also designed by Mies van der Rohe.