A baker is a skilled tradesman who bakes and sometimes sells products made out of flour by using an oven or other concentrated heat source. The place where a baker works in is generally a bakery.
Band in the Middle Ages most landlords had a bakery. They had a public oven and housewives brought the dough to the baker to cook.
Bread is now much sweeter than it was in the Middle Ages because a lot of corn syrup or honey is used.