Which architect's brand identity was so dramatically enhanced by a single building that they were subsequently commissioned for over 40 additional major projects in that city alone?

In the world of architecture, brand identity often extends beyond logos and marketing materials to the very structures firms design. Some architectural firms have created signature buildings that have become synonymous with their brand and design philosophy. This trivia question explores how one famous architect leveraged a single iconic structure to transform not just their personal brand, but the identity of an entire city.

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Frank Gehry with the Guggenheim Museum in Bilbao, Spain
Zaha Hadid with the MAXXI Museum in Rome, Italy
Santiago Calatrava with the City of Arts and Sciences in Valencia, Spain
Norman Foster with 30 St Mary Axe (The Gherkin) in London, UK