Last year, when the Museum of Modern Art appointed Quentin Bajac to be its new chief curator of photography, only a few New Yorkers knew much about the 47-year-old Frenchman except that his credentials were impeccable.

WSJ: Snapshot of a Curator | Quentin Bajac | Cultural Conversation by Richard B. Woodward

The following year, Mr. Welch married the daughter of Louise Palermo, a 56-year-old museum curator who had been a pen pal while he was overseas.

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