Yes, I thought something like that could have been used. I just wonder, if it was used on walls it would be like an ancient form of decal? Would there problems like artifacts from clipping?
I'm currently working on an asset pack for a Persian Steppe environment and I've been making a lot of ornamented stuff and A LOTT of stencils, decals, brushes etc. I don't know if it fits EXACTLY in handpainted (technically it is but not fully) but here it is anyway: