Piombi, the notorious roof-cells (sotto piombi, 'under the leads') of the state-prisons of Venice (q.v.), in which Casanova and many other notable prisoners were confined. The heat in summer and the cold in winter are said to have been intense. Of late it has been asserted that they must have been comparatively pleasant abodes.
Piombi
Chambers's Encyclopaedia, Volume 8: Peasant to Eoumelia, p. 190
Source scan(s): p. 0199