The monastery of the Virgin of the Source (Θετόκος τῆς Πηγῆς) at Constantinople, remarkable for both its duration and its renown, is known particularly from two collections of miracles compiled at a great distance in time from each other : one in the second half of the tenth century and the other in the last years of the reign of Andronicus II Palaeologus (1282-1328). In tracing the monastery’s history from its origins (6th c.) until the fall of Constantinople (1453) the article analyses the literary and social aspects of the two documents. Although the anonymous author of the first collection combines accounts of a patriographic nature with healings of prestigious figures (the imperial family and high dignitaries), the author of the second...