In the time of Augustus, and in the middle ages, the whole waste from Aquileia to Ravenna was covered with woods, lakes, and morasses. Man has subdued nature, and the land has been cultivated since the waters are confined and embanked. See the learned researches of Muratori, (Antiquitat. Italiae Medii Aevi. tom. i. dissert xxi. p. 253, 254,) from Vitruvius, Strabo, Herodian, old charters, and local knowledge.