What is in this image? Describe it as if you were explaining it to someone from the 15th century.

You see here a depiction of a large, wheeled carriage without horses, a marvel of our future times. It is designed to carry bread and other baked goods. The carriage, quite stout and round, moves about without the need for animals to pull it, propelled by its own hidden mechanisms. Upon its side is an emblem representing a loaf of bread adorned by a burst, perhaps indicating the freshness or heat of the bread within.The back of this carriage is open, revealing shelves with neat rows of bread—similar to how one might see goods displayed at a market stall. The rear also shows loaves with steam rising, suggesting they are fresh from the oven. This magical vehicle seems to be a traveling oven or store, bringing freshly baked bread directly to where it is desired, a notion surely as wondrous as any fantastical tale from distant lands.