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Person

Jean-Pierre Protzen

A man with gray hair and glasses, wearing a dark blazer over a maroon sweater and light blue shirt, stands with his arms crossed against a neutral background.

Swiss-born architect and historian of construction, long at the University of California, Berkeley. From the late 1970s onward he carried out field experiments at the Inca quarries of Kachiqhata and Rumiqolqa, reproducing polygonal joints with nothing but river cobbles used as hammerstones. His 1993 book on Ollantaytambo remains the standard technical reference for how Inca walls were actually shaped.

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