The creation of the abbey is generally connected with the large donations from marquis Aimeric of Este, in the 950s, followed by others from Hugh of Tuscanya few years later.
Boniface I, Margrave of Tuscany (died 823), governor of Italy under Charlemagne after the death of King Pepin
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Boniface III, Margrave of Tuscany (c. 985 – May 6, 1052), father of Matilda of Canossa and the most powerful north Italian prince of his age
Before him, his father and grandfather, Count Boniface I of Lucca and Boniface II, probably of Bavarian origin, had controlled most of the counties of the region and had held higher titles as well, such as a Prefect of Corsica or a Duke of Lucca.
Tuscany | Margrave | Frederick I, Margrave of Brandenburg-Ansbach | Matilda of Tuscany | Henry, Margrave of Frisia | Waldemar, Margrave of Brandenburg-Stendal | Grand Duchy of Tuscany | Ferdinando I de' Medici, Grand Duke of Tuscany | margrave | Cosimo I de' Medici, Grand Duke of Tuscany | Grand Duke of Tuscany | Cosimo III de' Medici, Grand Duke of Tuscany | Werner, Margrave of the Nordmark | Tuscany (rose) | ''Tuscany'' | Otto III, Margrave of Brandenburg | Lari, Tuscany | John, Margrave of Brandenburg-Kulmbach | Gunzelin, Margrave of Meissen | George Frederick Charles, Margrave of Brandenburg-Bayreuth | Boniface I, Margrave of Tuscany | Bernard, Margrave of the Nordmark | Willa of Tuscany | Vinci, Tuscany | tuscany | Philip William, Margrave of Brandenburg-Schwedt | Odo I, Margrave of the Saxon Ostmark | Margrave of Tuscany | Margrave of Brandenburg-Kulmbach | Margrave of Brandenburg-Ansbach |
He brought Western monasticism to the island by requesting monks from Abbot Desiderius of Montecassino and in this he was supported by both Pope Alexander II and Godfrey the Bearded, Margrave of Tuscany, though the archdiocese of Pisa, thitherto chief religious influence on the island, opposed it.
Until the 1803 secularisation of Bavaria, Steingaden belonged to the Steingaden Abbey, established in 1147 by Welf VI, Margrave of Tuscany and Duke of Spoleto, and third son of Henry IX, Duke of Bavaria.
Boniface, Count of Bologna (died c. 1011), Count of Bologna and Margrave of Tuscany