Walk of Mary across the mountains, Maximilian Liebenwein.
Maximilian Liebenwein was an Austrian/German illustrator active during the “Golden Age” of illustration in the late 19th and early 20th centuries.
I’m unsure what the medium is here, but it looks like watercolor and gouache to me.
I sourced the image from here, larger version here.
For more, see my previous post on Maximilian Liebenwein.
Link: Walk of Mary across the mountains (Fine Art America)