In an Irish context, the Knights Hospitaller and the Knights Templar were the most significant expressions of this unusual vocation that sought to combine military service with monastic observance.
The Global Side of Medieval at the Getty Centre: Traversing the Globe Through Illuminated Manuscripts
Apart from brief accounts of attacks on Lindisfarne and Donemutha in the 790s, there are almost no accounts of Viking attacks on Anglo-Saxon monasteries in contemporary sources. There are however many in twelfth century sources, most of them fictive or largely so. This article tries to explain why twelfth-century authors found it so important to invent stories of Viking brutality towards monks and nuns and what ideas and material they used to create their stories