The subject of this post is one of the second sort of thing. If the viewer belongs to either the Orthodox Christian or the Greek Catholic (Byzantine) church, he/she will immediately know what the object illustrated is (or is used for). Everyone else will probably make a guess about it, but will probably be incorrect in that guess.
I'm neither Orthodox Christian or Greek Catholic. So when I saw this item in an antique shop recently, I thought it was either a butter press or a printing block used to apply a pseudo-stencil onto a wall. The antique dealer had no idea what it was. I didn't really care what it was; I just wanted it because it looked interesting and old.
If I had been either Orthodox Christian or Greek Catholic, I would have known that this object was actually a bread press used to press a design into dough ~ similar to how a butter press is used.
A leavened bread, known as a prosphora when stamped with this press, was used in the Divine Liturgy (Eucharist). The dough, made from wheat flour, water and salt, is unique in that the ingredients are mixed together and then set aside for a week to evolve into a sourdough ball from which its own yeast can be derived. The sourdough ball is crumbled into a bowl of water, and in time it starts to bubble as the natural yeast brews. More flour is added, and the resulting dough is kneaded by hand until all the air is forced out. Two-thirds of the dough is formed into a large, round patty and the remaining one-third is formed into a smaller, round patty. The small patty is stacked on top of the large patty (their matching surfaces having been brushed with water so that they'd stick together), and then the press, which will have been dusted with a bit of flour, is positioned on top of the stack. The press would be pushed down into the dough, compressing the small patty almost completely into the large patty. The press, stuck in the dough, is left for three or four minutes, allowing it to be loosened and more easily extracted. The dough is then heated to complete the bread-making process.
The design inscribed on the press that I own is the same as the design on all other prosphora presses. It includes a cross comprised of five squares. The central square is referred to as the Lamb. It is divided into four smaller squares which hold Greek letters IC XC NIKA, which translates as "Jesus Christ conquers." The squares above and below the central square, are copies of the central square.