Wikipedia
The Mutschel is a traditional star-shaped bread from Reutlingen, Germany. The pastry, and the corresponding Mutscheltag (Mutschel Day), have probably existed since the 13th century. Mutscheln are roughly circular and come in various sizes: usually approximately six inches in diameter, but bakeries often offer breads three or more feet in diameter. They are sometimes made in sweet varieties.
There are several theories about the origin of the bread form. One is that the high central part of the bread represents the castle atop the Achalm, a hill next to Reutlingen, and the eight points of the star represent medieval guilds. The star could also have Christian allegorical meaning as the Star of Bethlehem. A third possibility is that Reutlingen baker Albrecht Mutschler invented the shape in the 14th century. This baker was mentioned first in the 1435 Reutlinger Heimatbuch.