The Northwestern National Life Insurance Building (NWNL Building) in Minneapolis, USA, is a building that leaves a lasting impression not because of its height, but because of its style and atmosphere. Completed in 1965, the building designed by Minoru Yamasaki is today regarded as one of the most important examples of the New Formalism movement in the United States. Its slender arcades, light-coloured concrete with added quartz, and almost sacred atmosphere have made the building an undeniable architectural icon of Minneapolis.
NWNL Building – elegant 1960s modernism
The headquarters of the Northwestern National Life Insurance Company was built during a period of intensive redevelopment in the centre of Minneapolis, when outdated early 20th-century buildings were being demolished on a massive scale. Yamasaki, however, rejected the cold functionalism typical of many corporate office blocks of that era. Instead of heavy concrete walls, he proposed a rhythm of slender columns and tall arcades inspired by classical and Gothic architecture. The facades of his building are made of white concrete enriched with quartz. This creates a remarkable effect of the surface’s hue shifting with the light and weather. However, it is the portico, some 26 metres high, that attracts the most attention. A row of pointed arches forms a ceremonial entrance opening up a view of the city centre. Throughout the building, there are as many as 63 slender columns, which many historians regard as a precursor to the aesthetics of the later World Trade Center.
Architecture of light and tranquillity
Yamasaki attached great importance to the user experience. Tall glazed sections allowed vast amounts of natural light to flood the interiors, reflecting off the light-coloured stone, metal and concrete. The characteristic arched windows stretched almost from floor to ceiling, lending the rooms an elegant, tranquil atmosphere. The architect was born in 1912 in Seattle, the son of Japanese immigrants. His work drew inspiration from Islamic, Gothic and classical architecture, whilst he spoke openly of the need to design buildings that were ‘gentle’ on people. In Minneapolis, these ideas found an exceptionally coherent form.
The Second Life of the NWNL Building
Over the many years of its existence, the building has operated under various names, including the ReliaStar Building and ING 20 Washington, yet it has always retained its recognisable appearance. In recent years, a debate has begun regarding its future. In 2026, a project was announced to transform the former insurer’s headquarters into a boutique hotel with around 165 rooms, a restaurant, event spaces and a terrace on the roof of the portico. The idea for such a conversion has met with mixed reactions. The extensive scope of the changes carries the risk of significant interference with the preserved interiors, but perhaps this is the only chance to breathe new life into this modernist icon? After 60 years, the Northwestern National Life Insurance Building still stands out from the American office buildings of its era and resembles a contemporary interpretation of a temple more than the former headquarters of a corporation.
Source: docomomo-us-mn.org, archpaper.com
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