caviedia
In ancient Roman buildings, an open court, supposed by some writers to be the same as Atrium. There are five kinds, which, from their mode of construction, are severally denominated Tuscan, Corinthian, Tetrastyle, Displuviatum and Testudinatum. The Tuscan had a roof projecting from each wall of the court, leaving an opening in the centre. The timbers and compluvia of Corinthian cavaedia is similar to the Tuscan, except the roof was supported by columns. The Tetrastyle had the roof supported by a column at each angle; the Displuvinated being without any roof. The Testudinated had the court roofed in with a vault rising from the walls where the space to be covered was not too large. (Garnsey, 1887)