Engineer, architect and pioneer of tensile structures, Frei Otto takes the “O” spot for this week’s A to Z of Expo Architects. Rising to fame for designing the Federal Republic of Germany’s revolutionary pavilion at World Expo 1967 Montreal, Otto later added to his Expo contribution by co-designing Japan’s iconic paper pavilion at World Expo 2000 Hannover.

One of the fathers of modern architecture, a Pritzker Prize laureate and a key figure in the development of Brasilia, Oscar Niemeyer is in the spotlight for this week’s instalment of the Expo Architects A to Z.

Selected to design the pavilion of his home country, at World Expo 1939 New York, Niemeyer created a unique vision of “Brasilidade”, portraying the country’s modernity to an American audience while remaining committed to Brazil’s own identity.

The M spot of the A-Z of Expo Architects series is occupied by Imre Makovecz, a major figure of organic architecture and first President of the Hungarian Academy of Arts. Marginalised by authorities from 1976 until the end of the 1980s, Makovecz was commissioned to design the country’s pavilion at World Expo 1992 Seville, which perfectly encapsulated his compelling idiosyncratic and organic style.

Renowned Polish-American architect, artist and designer Daniel Libeskind occupies the L spot in the A to Z series. For World Expo 2015 Milan, Libeskind’s studio created not only a corporate pavilion for Chinese property developer Vanke, but also the four gleaming gate-like structures in the heart of Piazza Italia – ‘The Wings’.

A well-established figure for the daring and spectacular shapes of his designs, Libeskind teamed up with Vanke to create a pavilion that developed Expo 2015’s theme “Feeding the Planet, Energy for Life”, and which showcased green technology and sustainability, both in its form and its content.

Taking the letter K in the Expo Architects series is Kisho Kurokawa, a leading figure in Japanese architecture of the 20th century who pioneered organic structures. At Osaka’s futuristic World Expo 1970, Kurokawa designed three pavilions: the Capsule House theme pavilion, the Takara Beautilion pavilion and the Toshiba-IHI pavilion.