which came first, year one or the dark knight returns?

[DerekPowers]

which comics came first? also, i know frank miller did the art in tdkr, but did he do year ones art? thanks.

[Russkafin]

I think he did TDKR first, but I could be wrong. And I dont think he did the art on Year One.

[Clayface]

TDKR came first, and he did not do the art for Year One.