This. My great-grandmothers all used to bake bread in the village Backhaus once a week, and the oven temperature was always checked by baking something pizza-li

This. My great-grandmothers all used to bake bread in the village Backhaus once a week, and the oven temperature was always checked by baking something pizza-like, for example a crude Salzkuchen [0], which is basically a very thin Quiche, or just a flat portion of dough which was eaten without or with a cold topping. I guess that basically every culture which developed baking skills has one or multiple dishes which resemble a Pizza. [0] http://www.ebbi-world.de/brot/salz-kuchen-stueck.jpg http://www.ebbi-world.de/brot/salz-kuchen-stueck.jpg