 The resulting work, "Selections from Church History" (), known better by its Latin title "Historia Tripartita", is a single narrative in four books which gives Theodorus' preferred reading for each section of history related, with notes and comparisons in the margins.Theodorus later continued his chronicle, using other available sources to write his "Church History" () from the death of Theodosius II down to 518.The date of composition is not known, though it was probably finished before 543, as it can be conjectured that Theodorus would not have spoken of the "holy memory" of Theodoret following the onset of the Three-Chapter Controversy.