the Imperial Crown was probably made for Otto I in the workshops of ReichenauAbbey. Peter Hamish Wilson, The Holy Roman Empire, 1495–1806, MacMillan Press
世界文化遗产——瓦尔特堡城堡. 宣讲家网. [2015-09-14]. (原始内容存档于2016-04-15). (英文)Monastic Island of Reichenau. UNESCO. [2012-02-15]. (原始内容存档于2017-07-11). 世界文化遗产——修道院之岛赖兴瑙. 宣讲家网. [2013-12-18]