Which renowned architect's personal logo features a stylized red square that has become as iconic as their buildings?

Architects often develop distinctive visual identities that become as recognizable as their buildings. These personal brand marks help establish their place in the industry and create instant recognition. From minimalist symbols to typographic solutions, these logos embody the design philosophy of the architect or firm. This trivia question tests your knowledge of some of the most influential architectural brand identities of the modern era.

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Frank Lloyd Wright (with his signature red square containing geometric initials)
Zaha Hadid (with her flowing parametric red square logo)
Norman Foster (with his minimalist red square containing an 'F' mark)
Renzo Piano (with his red square containing a stylized building silhouette)