What is "braisers"

Usage examples of "braisers".

There was food too—fruit, sweet confections, shellfish, and roast pork with honey, kept warm over braisers set up on the paving stones of the plaza, the odors thick in the air.

At the edge of the market there was an open-sided wooden building where water steamed in copper pots over braisers and a rough stone oven smelled strongly of sweet bread.