Boule from the French for "ball", is a traditional shape of French bread, resembling a squashed ball. It is a rustic loaf shape that can be made of any type of flour
. A boule can be leavened with commercial yeast
, chemical leavening, or even wild yeast sourdough. The name of this bread is the reason a bread baker is referred to as a "boulanger" in French, and a bread bakery a "boulangerie."