This drawing was undated, so I can only guess that it was drawn somewhere in the mid-1990s. I also abandoned it and it has languished unfinished even as a pen and ink illustration. While it was not intended as an illustration for L. Frank Baum's venerable Oz books, while I was coloring it the association seemed to fit.
During last night's round of insomnia, I cleaned out all of the original stippling and started to play with the colors. When I realized that the structure belonged in Oz, I went for a green scheme. I played with rays coming out of the stained glass Star of David, but they cluttered the image and I eliminated them.
I must not have cared for how the drawing was turning out to abandon it, but now I really quite like it.