Pieta / The Death of Captain Marvel [MGN #1] (HOMAGES)
Reviews I have read say that Michaelangelo's statue, "Pieta" (the Madonna holding the body of the Christ), is the inspiration for covers like X-Men #136 and Crisis on Infinite Earths #7. I don't know - the pose is definitely similar, with the arm hanging down, and head pointed to the left, but she's sitting down. On most of the covers like X-Men or Crisis, the one holding the body is standing.
However, there are some covers that are definitely based on the Pieta, and the first one that I know of is Marvel Graphic Novel #1: The Death of Captain Marvel. So this list is covers that homage MGN #1, which homages the Pieta. It's a short list so far, but enjoy.