The Abbey of Honau was a monastic foundation in Northern Alsace which flourished from the 8th century until 1290, when it succumbed to the flood-waters of the Rhine.
In 776 the Abbot Beatus is mentioned in a Charter from Charlemagne, referring to him as bishop and confirming that the Abbey would continue to be administered by Irish monks (Grandidier, op.cit.).
On 7 September 1290 Conrad de Lichtenberg, the Bishop of Strasbourg, transferred the Chapter to Rhinau, where a new Abbey was built, this too on an island in the Rhine.
The Chapter then moved to Strasbourg on 22 May 1398, where the canons were permitted to practice their liturgy in the church of Saint Pierre le Vieux (Hunkler, op.
The now lost cartulary of Honau, written in 1079, and described by a 17th-century Jesuit, recorded over a thousand charters from the foundation of the abbey until the time of Charlemagne.