The existence of ovens like this is easily documented for the 18th century. In fact, just about every ancient culture had a very similar oven. There’s one particular wood cut illustration from medieval times depicting an earthen oven built on a wagon. There are references in 18th century literature and also archaeological evidence that you […]
Preindustrial Craftsmanship 
This oven is a lot like like a simple ceramic oven ceramic artists sometimes make to bake their art outside. an oven which bakes itself; of course the temperature wouldn’t be high enough to make ceramic pottery to use for drinking out of it(for that the glaze has to simmer higher like on 1250 degrees used for porcelain )but it would be okay for decoration objects)Thanks for posting 🙂