Old Thur Bridge (Crooked Bridge) Bischofszell

The old bridge is also called the crooked bridge because the eight Nagelfluh pillars are not arranged in a straight line.

Old Thur Bridge, Bischofszell
The eight-bay old Thur Bridge leads over the Thur southwest of the city center of Bischofszell and is the longest, still preserved natural stone bridge in Switzerland. It is called the “crooked bridge” because its floor plan has a few kinks so that the pillars on the Nagelfluh rocks could be anchored in the river bed.
One of the most famous sights in Bischofszell is the legendary bridge, which, built in 1487, was donated “free of customs and travel charges” by a noblewoman von Hohenzorn in memory of her sons who drowned in the river. Instead of a toll, everyone who crosses the bridge should pray an Our Father.
The economic version reads a little more soberly: use remained duty-free until 1796, which meant that Bischofszell became a trading point for linen and long-distance trade. In order to secure the important traffic route and protect the bridge pillars from the often rising Thur, the striking flow dividers were built on both sides in the 16th or 17th century.
Text / Source: Thurgau Lake Constance, Tourism
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The eight-bay old Thurbrücke leads southwest of the city center of Bischofszell on the Thur. It is also called crooked bridge because its layout has some kinks so that the pillars could be founded on the Nagelfluhfelsen in the riverbed. The 116-meter-long bridge made of tuff and sandstones is the longest preserved natural stone bridge in Switzerland from the Middle Ages.