An andiron (older form anderne; med. Lat. andena, anderia) is a horizontal iron bar upon which logs are laid for burning in an open fireplace. They are usually used in pairs to build up a firedog in American English, sometimes called a dog or dog-iron, intended to hold logs above the hearth in order to improve air circulation for better burning. In older eras (e.g. 16th to 18th century AD) andirons were used as a rest for a roasting spit; and sometimes included a cup-shaped top to hold porridge. The earliest andirons were forged from wrought iron.