 Nevertheless we may posit that the Islamic concept acted as a stimulus towards the reinvention of the "ribāṭ" in completely Christian guise.In such a case, moreover, the anthropologist would expect precisely "not" to find that document institutional continuity upon which the medievalists so depend.Elena Lourie argues that the notion of temporary service, so alien to Christian idea of vocation, yet central to the nucleus of the rule of Belchite of 1122 (preserved in the re-issue of 1136, with changes) could only have come from the Islamic "ribāṭ".