47°41′42″N 9°43′12″E / 47.695°N 9.72°E
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Argengau was a territory of Alemannia within East Francia in the 8th and 9th centuries, being a county in the 9th century,[1] and of the Duchy of Swabia in the 10th. It was situated north of Lake Constance, comprising Lindau. It was named for the Argen river.
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