Puteal, properly means the enclosure surrounding the opening of a well, to protect persons from falling into it. It was either round or square, and seems usually to have been of the height of three or four feet from the ground. It was the practice in some cases to surround a sacred place with an enclosure open at the top, and such enclosres, from the great similarity they bore to putealia, were called by this name. there were two such places in the Roman forum; one of these was called Puteal Libonis or Scribonianum, because a chapel in that place had been struck by lightning, and Scribonius Libo expiated it by proper ceremonies, and erected a puteal around it, open at the top, to preserve the memory of the place. The form of the puteal is preserved on several coins of the Scribonian gens. This puteal seems to have been near the atrium of Vesta, and was a common place of meeting for usurers. The other puteal was in the comitium, on the left side of the senate-house, and in it were deposited the whetstone and razor of Attus Navius. - Smith, 1873