Revisions allow you to track differences between multiple versions of your content, and revert back to older versions.
From CBaisier, Director of the Museum Mayer van den Berghe:
Manfred Sellink and Till Holger-Borgert saw the grisaille at TEFAF and in our museum, and confirm that it is work by Jan I Brueghel. The painting is a copy from the original work by Pieter I Bruegel dated 1565 in The Courtauld Gallery London. This painting was the only one that never left the family Bruegel, and was inherited by Jan I Brueghel.
Both sons made a lot of copies of the grisaille. All the 15 known paintings by Pieter II Brueghel are in colour [see Ertz 1998, pp. 380-386]. Specialists suppose he copied engravings. All the paintings by Jan I Brueghel seem to be in grisaille, and based on the original work of his father he had in his own collection .