 His chronicle, regarded as one of the best of the period, both for literary merit and for historical value, is known as the "Gesta Episcoporum Tungrensium, Trajectensium, et Leodiensium", and is a continuation of the earlier work by Heriger of Lobbes (d. 1007) that dealt with the first twenty-seven bishops, from St. Maternus (90) to Remaclus (680).Anselm's work, written at the request of his godmother, the countess Ida, Abbess of St. Cecilia, Cologne, added the lives of twenty-five more bishops, down to Wazo, of whom he gave a very full and particular account.The "Gesta" is to be found in the "Monumenta Germaniæ Historica" ("Scriptores", VII, 161-234; also "Scriptores", XIV, 107-120 (1883)).