Lithography. Incredibly medieval, but beautiful. I hope it never dies. The labour and the pain and the fumes and mess are all worth it.
Believe me, these prints are way better in real life. There's an effervescence to the drawing material and the texture of the paper than you can't see in these photos.
I have a very limited edition of both prints, but because they are multiples, I am up to selling! The diptych, though, is not for sale.