In Italy in the Middle Ages, a unit of land area, = 1600 square staioli, about 2640.6 square meters. Also called petia. It is best understood through decomposition (after Kidson):
An ordine was a strip of land 10 staioli by 1 staiolo, thus = 10 square staioli.
Ten ordini made a catena, a square containing 100 square staioli.
Four catene made a quarta, a square containing 400 square staioli.
Four quarta made a pezza, a square containing 1600 square staioli.
Doursther (1840, pages 400, 505) says the stajolo then in use in Rome = ¹⁄₁₀ catena (the measure of length) = ¹⁄₁₀₀ catena (the measure of area), and the pezzo = 16 catenas = 1600 square stajoli, about 2640.7 square meters.
A Metrological Investigation.
Journal of the Warburg and Courtauld Institutes, vol. 53 (1990).
De mensuris et ponderibus Romanis et Graecis, cum his quae hodie Romae sunt collatis libri Quinque.
Venice: P. Manutius, 1573.
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