"Hendrick Gerritszoon van Uylenburgh (c. 1587 – 1661) was an influential Dutch Golden Age art dealer who helped launch the careers of Rembrandt, Govert Flinck, Ferdinand Bol and other painters." - (en.wikipedia.org 12.08.2021)
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(The left column lists the relations of this actor to objects in the right column. In the middle you find other actors in relation to the same objects.)