Artemisia Gentileschi, Judith Slaying Holofernes, 1614–20. I find the gruesome imagery of this painting to be incredibly moving. Inspired by Caravaggio, Artemisia used aggressive contrast to really emphasize the subject matter. The portrayal of the facial expressions is chilling, and she successfully achieved the appearance of the physical weight and struggle.
https://flic.kr/p/ei3g2b | Judith (and Holofernes) by Margaret Agnes Rope | This panel was fitted in a private house and remains in private hands. It is presumably a student piece from Marga's early years.