The Barcelona Pavilion (Catalan: Pavelló alemany; Spanish: Pabellón alemán; "German Pavilion"), designed by Ludwig Mies van der Rohe, was the German Pavilion for the 1929 International Exposition in Barcelona, Spain. This building was used for the official opening of the German section of the exhibition. It is an important building in the history of modern architecture, known for its simple form and its spectacular use of extravagant materials, such as marble, red onyx and travertine. The same features of minimalism and spectacular can be applied to the prestigious furniture specifically designed for the building, among which the iconic Barcelona chair.

Mies was offered the commission of this building in 1928 after his successful administration of the 1927 Werkbund exhibition in Stuttgart. The German Republic entrusted Mies with the artistic management and erection of not only the Barcelona Pavilion, but for the buildings for all the German sections at the 1929 Universal Exhibition. However, Mies had severe time constraints—he had to design the Barcelona Pavilion in less than a year—and was also dealing with uncertain economic conditions.

Barcelona (English /bɑrsɨˈloʊnə/, Catalan: [bərsəˈɫonə], Spanish: [barθeˈlona]) is the capital of Catalonia and the second largest city in Spain, after Madrid, with a population of 1,621,537 within its administrative limits on a land area of 101.4 km² (39 sq mi). The urban area of Barcelona extends beyond the administrative city limits with a population of between 4,200,000 and 4,500,000 within an area of 803 km² (310 sq mi), being the sixth-most populous urban area in the European Union after Paris, London, the Ruhr, Madrid and Milan. About five million people live in the Barcelona metropolitan area. It is also Europe's largest metropolis on the Mediterranean Sea. It is the main component of an administrative area of Greater Barcelona, with a population of 3,218,071 in an area of 636 km² (density 5,060 hab/km²). It is located on the Mediterranean coast between the mouths of the rivers Llobregat and Besòs and is bounded to the west by the Serra de Collserola ridge (512 m/1,680 ft).

Founded as a Roman city, Barcelona became the capital of the County of Barcelona. After merging with the Kingdom of Aragon, Barcelona became one of the most important cities of the Crown of Aragon. Besieged several times during its history, Barcelona has a rich cultural heritage and is today an important cultural centre and a major tourist destination. Particularly renowned are the architectural works of Antoni Gaudí and Lluís Domènech i Montaner, which have been designated UNESCO World Heritage Sites. The headquarters of the Union for the Mediterranean is located in Barcelona. The city is known for hosting the 1992 Summer Olympics as well as world-class conferences and expositions, including the 1888 Exposición Universal de Barcelona, the 1929 Barcelona International Exposition (Expo 1929), the 2004 Universal Forum of Cultures, and the 2004 World Urban Forum.

Ludwig Mies van der Rohe (March 27, 1886, Aachen – August 17, 1969, Chicago) was a German-American architect. He is commonly referred to, and was addressed, as Mies, his surname. Along with Walter Gropius, Le Corbusier and Oscar Niemeyer, he is widely regarded as one of the pioneering masters of modern architecture.

Mies, like many of his post-World War I contemporaries, sought to establish a new architectural style that could represent modern times just as Classical and Gothic did for their own eras. He created an influential twentieth century architectural style, stated with extreme clarity and simplicity. His mature buildings made use of modern materials such as industrial steel and plate glass to define interior spaces. He strived towards an architecture with a minimal framework of structural order balanced against the implied freedom of free-flowing open space. He called his buildings "skin and bones" architecture. He sought a rational approach that would guide the creative process of architectural design. He is often associated with the aphorisms "less is more" and "God is in the details".