for many years, conrad was believed to be the only author of the "chronicon urspergense", a chronicle of world history for the time of king ninus of assyria to ad 1229. later it came to be believed that the work was written in several parts by several different people. the first part, which covers the period up to 1125, was written, in part at least, by ekkehard of aura; a continuation, from 1126 to 1225, was added by abbot burchard of biberach, who preceded conrad as abbot of ursperg. conrad himself continued the work to 1229 and made the final redaction. today, burchard is seen as the author of the whole.