Is there a consensus among art historians about whether it's a work by Mondriaan or not? Christies seems to say it is: https://www.christies.com/en/lot/lot-6435

Is there a consensus among art historians about whether it's a work by Mondriaan or not? Christies seems to say it is: https://www.christies.com/en/lot/lot-6435483 https://www.christies.com/en/lot/lot-6435483