Historian of the art of Chile and Peru.

Art historian; author of biographies on artists Frida Kahlo and Arshile Gorky. Hayden Phillips was born in Boston, the daughter of Elizabeth and John Phillips and the grand niece of William Phillips (1878-1968) Ambassador of Italy from 1917-1941. She attended North Country School and Putney School in Vermont. During her senior year, she traveled abroad with her mother to France, attending American Community School of Paris. She entered Radcliffe college, but left to pursue painting. In 1958, Herrera was a member of the Junior Assembly, a group in charge of debutante balls in New York.

Lehman was born in 1905 in Charlottenburg, Germany. His parents were Frida Model and manufacturer Georg Lehmann. He began his studies at Freiburg University and later completed his doctorate of philosophy at the University of Frankfurt. He worked under Rudolf Kautzsch and completed his dissertation Lombardische Plastik im letzten Drittel des XV. Jahrhunderts in 1928.

Early work on the history of colonial Spain; architectural history of Latin America; created the Institute for aesthetic reserach at the University of Mexico. (Laboratorio de Arte)