Ana, the beautiful young wife of the greatest romanian mythical master builder, was cemented into the walls of the princely monastery he and his men were building. As the legend goes, the builder believed that "nothing durable and unique can be built without the creator's sacrifice of something beloved and precious". I envisioned her escape from the walls, happily strolling and singing away from the place of her demise. P.S.: more details regarding the original tale here: https://en.wikipedia.org/wiki/Me%C8%99terul_Manole