Precast Bake ovens. Several examples of precast bake ovens from Europe and from North America. Click on the thumbnail images for an enlarged view. Building a Brick Pizza Oven. Limited details, but interesting enough.
Good photos fill in some of the blanks.
Traditional oven for a Colonial fireplace - located at Jim Buckley's Rumford site. A .gif schematic. Quick loading and fairly detailed. Very clean but takes a bit of intuition. Several plans and excellent photos available on the site.