The mysterious baroque painter Johannes Gumpp is known to have painted only one self portrait which also happens to be a triple self portrait in which he appears from behind painting his own face reflected in a mirror.
Paul Cézanne was such a slow painter that, when he painted still lifes involving fruit, the content would often begin to rot before he had time to finish. To get around the problem, he started using waxed fruit instead.
Rembrandt’s students pranked him by painting fake coins on the floor to watch him try to pick them up.
Picasso drew a sketch on the back of every check he wrote to pay a bill, knowing that almost everyone would save the check without cashing it because the picture made the check worth more than face value.