Which architectural element is a signature brand characteristic of Frank Gehry's design style that has become instantly recognizable worldwide?

The intersection of architecture and branding creates some of the world's most recognizable built environments. Major architectural firms have developed distinct brand identities that make their buildings instantly recognizable. This poll tests your knowledge of which architectural elements are signature characteristics of famous architectural brands that have shaped skylines and public spaces worldwide.

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Undulating titanium facades with complex curved geometries
Minimalist glass boxes with exposed steel structures
Neoclassical facades with symmetrical colonnades
Parametric lattice structures with honeycomb patterns