Many years ago I read a story about a time-traveler who was rescuing works of art which had not survived a nuclear war; it ended with his machine being destroyed and causing the nuclear war. Anyone have a clue what this story is, or the author?
[Added from OP's comment:]
I read the story sometime in the 1970s or '80s; for some reason I had associated it with Robert Silverberg, but I haven't found anything by him that sounds close. It was an English-language story, and as I recall, the time machine was a sphere hidden underwater, and when he tries to escape with the works of art, the sphere is interpreted as a weapon and destroyed, which touches off the war.