Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Eusebian canons or Eusebian sections, also known as Ammonian Sections, are the system of dividing the four Gospels used between late Antiquity and the Middle Ages. The divisions into chapters and verses used in modern texts date only from the 13th and 16th centuries, respectively. The sections are indicated in the margin of nearly all Greek and Latin manuscripts of the Bible, and usually summarized in Canon Tables at the start of the Gospels. There are about 1165 sections: 355 for Matthew, 235 for Mark, 343 for Luke, and 232 for John; the numbers, however, vary slightly in different manuscripts. Until the 19th century it was mostly believed that these divisions were devised by Ammonius of Alexandria, at the beginning of the 3rd century, in connection with a Harmony of the Gospels, now lost, which he composed.