Doyen

doyen \ˈdoi-ən\ noun: 1 a. the senior member of a body or group, b. a person considered to be knowledgeable or uniquely skilled as a result of long experience in some field of endeavor,
2. the oldest example of a category

doyenne \doi-ˈ(y)en\ noun: a woman who is a doyen

Etymology: French, from Old French deien, from Late Latin decanus chief of ten, from Greek dekanos, from deka ten

Am I remembering correctly that these words appear often in art history literture to describe influential collectors or heads of art movements?