The Imperial Abbey of Buchau was initially a monastery of canonesses regular, and later a collegiate foundation, in Buchau in Baden-Württemberg, Germany.
According to tradition, the monastery was founded around 770 on an island in the Federsee by the Frankish Count Warin and his wife Adelindis . The abbey was put on a secure financial footing by Louis the Pious, who in 819 granted the nuns property in the Saulgau and in Mengen. In 857, Louis the German declared it a private religious house of the Carolingian Imperial family and appointed as abbess his daughter Irmingard .
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