"Last Supper" Mural made with Mother-of-Pearl - No identified artist

This item was purchased at an estate sale sometime ago. It is a mural of the "Last Supper" with about 40-60% of the picture is mother-of-pearl. All the people, some of the table and windows, a fruit basket, and other peices are made with the mother-of-pearl. The rest of the painting appears to be some kind of painted marbel. The backing is solid wood. I am unable to find its equal anywhere on the net and there are no artist makers mark on it.

Thanks!