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The ''Ponts Couverts'' are a set of three bridges and four towers that make up a defensive work erected in the 13th century on the River Ill in the city of Strasbourg in France. The three bridges cross the four river channels of the River Ill that flow through Strasbourg's historic Petite France quarter. The ''Ponts Couverts'' have been classified as a ''Monument historique'' since 1928. Construction of the ''Ponts Couverts'' commenced in 1230, and they were opened in 1250. As a defensive mechanism, they were superseded by the Barrage Vauban, just upstream, in 1690, but remained in use as bridges. As built, each of the bridges was covered by a wooden roof that served to protect the defenders who would have been stationed on them in time of war. These roofs were removed in 1784, but name ''Ponts Couverts'' (covered bridges) has remained in common use ever since.〔 ==Gallery== Wenceslas Hollar - Summer- the bathing place.jpg|Seen in ca. 1650 by Wenceslaus Hollar Johann Baptist Kreitmayer Straßburg 1863.jpg|Seen in 1863 by Johann Baptist Kreitmayer (1819–1879) Strasbourg tower.JPG|Close-up of a tower Strasbourg PontsCouverts n03.jpg|Three towers aligned Strasbourg Ponts couverts juillet 2012.jpg|The Ponts Couverts by night 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ponts Couverts, Strasbourg」の詳細全文を読む スポンサード リンク
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