source https://www.cnn.com/style/article/duke-of-brittany-replaced-wife/index.html
Infrared technology shows how a 15th-century French ruler erased his deceased wife from art history
It was a tragedy for Francis I of Brittany when his wife Yolande of Anjou died in 1440. But she was soon replaced -- both as his wife and in her own prayer book, where her image and coat of arms were painted over and replaced with those of her successor.
source https://www.cnn.com/style/article/duke-of-brittany-replaced-wife/index.html
source https://www.cnn.com/style/article/duke-of-brittany-replaced-wife/index.html