Rovigo (both
Rodigium and
Rhodigium in
Latin script) appears to be first mentioned in a document from
Ravenna dating April 24, 838; the origin of the name is uncertain. In 920 it was selected as his temporary residence by the
bishop of Adria,
Paolo Cattaneo, after the destruction of his city by
Hungarian marauders; the fortifications he ordered were already finished in 945. The
viscounts of Rovigo built a line of
brick walls in the 1130s in the name of the
House of Este. The current Torre Donà is a remnant of the castle built some time in between; it is 66 m high and it may have been the highest brick
tower at that time if the date of construction is correct. In 1194 Rovigo became a formal possession of
Azzo VI d'Este, duke of
Ferrara, who took the title of
conte (count) of Rovigo. The Este authority ended in 1482, when the
Venetians took the place by siege and retained possession of it by the peace of 1484. Although the Este recovered the city during the
War of the League of Cambrai, the Venetians, returning in 1514, retained possession until the
French Revolution. In 1806
Napoleon I Bonaparte created it a
duché grand-fief for general
Anne Jean Marie René Savary. The
Austrians in 1815 made it a royal city. With the fall of the 1815–1866
Kingdom of Lombardy–Venetia, Rovigo was annexed to the
Kingdom of Italy in 1866; in the same year it was connected by
railway to Padua, Ferrara,
Verona (through
Legnago), and
Chioggia (through Adria). In the 1900s the first modern
industries were established, the most important of which was a
sugar refinery. In 1927 the territory of the
comune was extended including close
municipalities. In 1937 the course of the Adigetto Canal was diverted to the west edge of the town and a large avenue called
Corso del Popolo was built in place of the former course. In the years 1943–1945 Rovigo was part of the
Italian Social Republic and it has been in Italy since 1946. In the 1950s and 1960s Rovigo had a dramatic development and it had the highest
urbanization rate among the towns in the Veneto region after
World War II. ==Government==