Billionaire Dr. Tom Kaplan combines his position as largest private Dutch Masters collector and Panthera founder to raise ...

The Dutch master’s sketch of a lion—the last still in private hands—now ranks as one of the priciest drawings ever sold at ...

The sale places it among the most valuable “Old Masters” works ever sold and was a lead piece during a week of auctions ...

A tiny drawing of a young lion by Rembrandt has sold for a record €12.7 million to an undisclosed buyer at Sotheby’s on Wednesday, with the proceeds going to wildlife charity Panthera. The drawing, A ...

“Young Lion Resting” (c1638-42) is co-owned by the Franco-American collector and metals billionaire Thomas Kaplan and by Jon ...