An important Carolingian document, probably formulated after the Council of Inden in 816 and then sent by the Abbot of Reichenau to Abbot Gozbert of St. Gall. The plan, written in ink on parchment, is an architect's drawing for the rebuilding of the monastic complex. The St. Gall Plan epitomizes an ideal 'modern' Carolingian monastic unit, and although it was never fully realized at St. Gall it remains an important source of reference for architectural historians and archaeologists.