PhotoWASSENAAR, the Netherlands — The Dutch chemical company executive and art collector Joop van Caldenborgh was attending a dinner in London in the 1990s when the American abstract artist Ellsworth Kelly approached him. “I didn’t even know what the artist looked like,” Mr. van Caldenborgh confessed recently. “A man came to me and said: ‘You must be Joop van Caldenborgh. Mr. van Caldenborgh did not even court him for the position, Mr. Pijbes said. “It is a world-class collection, but it’s personal, and it has a few strong accents,” Mr. Pijbes said.

Source: New York Times September 13, 2016 19:52 UTC