Took some searching, but seven years ago someone had a blog about an argentine-style oven. In the dry-ish northwest, I saw these all over. Seemed like every big house had one outside.

The chimney was ubiquitous. The arched, projecting doorway was sometimes, but not always, present. The doors were usually iron.

The idea of building a mold, then building around the mold with clay is pretty cool.

The amount of pre-heating is amazing. Seems like you would want to run a few batches of bread, empanadas, pizza to take advantage of the latent heat.

(Note: The linked blog provides an alternate solution to chopping the straw mixed with the mud. Process the straw through a horse.)