This "Four Oven Cooker" from Aga is made from cast iron, covered in "three coats of vitreous enamel" in fourteen different colors, weights 1,290 pounds, and must be installed by a certified fitter. It's available in an electric model, but please, if you can, go with the gas version. This is appliance porn at its finest, no unnecessary and fragile space-age frippery, but four separate simple ovens, all holes filled with hard cook. It's enough to make a gingerbread witch swoon.
It's $15,500 for this model (the one in the picture is technically the electric model, but the gas ones look the same) and features a specialized roasting oven behind door number five.