3 Pc Vtg Wall Plaque Flower Madonna St Andrew's Priory Stone Tile Wall Art

3 Piece Vintage Wall Plaque Tiles Large- Flower Madonna St Andrew's Priory Stone/ sandstone/  Tile Wall Art . I believe around 1970's but not sure. There are small marks, brand mark on the backs, but hard to read. The 2 smaller ones look like angels. Large is approx 5 x 8" x 3/8" Smalls are approx 5 x 3 1/8" and 3.5 x 3 5/8". These  seem like they are a type of pottery or stone. I am not sure. See all photos for more details.  Any questions please ask. All have hooks that could be used to hang them.