A masonry oven, colloquially known as a brick oven or stone oven, is an oven consisting of a baking chamber made of fireproof brick, concrete, stone, clay, or cob. Though traditionally wood-fired, coal-fired ovens were common in the 19th century, and modern masonry ovens are often fired with natural gas or even electricity. Modern masonry ovens are closely associated with artisanal bread and pizza, but in the past they were used for any cooking task involving baking.
The traditional direct-fired masonry design is often called a "Roman" or "black" oven and dates in Western culture to at least the Roman Republic. It is known as a black oven because the smoke from the wood used as fuel sometimes collects as soot on the roof of the oven. Such ovens were in wide use throughout medieval Europe and were often built to serve entire communities (cf the banal ovens of France, which were often owned by the local government and whose operators charged a fee to oven users). Such ovens became popular in the Americas during the colonial era and are still in wide use in artisanal bakeries and pizzerias, as well as some restaurants featuring pizzas and baked dishes. Descendants include the beehive ovens of the colonial United States and the Quebec ovens based on the designs of the banal ovens of France.
In the precolumbian Americas, similar ovens were often made of clay or adobe and are sometimes referred to by the Spanish term horno (meaning "oven").
Wood-burning masonry ovens are mandated for production of true Neapolitan pizza