Profile overview
Who is Stefan Diez?
Stefan Diez is an inventor associated with Germany. Their documented work in consumer & home includes Thonet 404 chair, the contribution at the center of this evidence-backed profile.
Stefan Diez designed Thonet’s 404 chair series, translating the manufacturer’s bentwood heritage into a contemporary wooden seat with engineered visual and technical details. Thonet credits Diez directly and calls the still-evolving chair an icon ten years after its launch, while continuing to sell the range.
What did Stefan Diez invent?
designed Thonet’s 404 wooden-chair series by reworking bentwood traditions through contemporary construction
What did Stefan Diez accomplish?
Thonet describes the 404 as an icon and retains it as a successful, updated chair series a decade after introduction.
What is known about Stefan Diez today?
The German Design Council published a first-person interview with Diez on 25 March 2025 about his current circular-design work.






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