The "sketchbook" or "manual" of Villard de Honnecourt (more correctly, an album or portfolio) dates to about c.1225-1235. It was discovered in the mid-19th century and is presently housed in the Bibliothèque nationale de France (BnF), Paris, under the shelfmark MS Fr 19093. It consists of 33 parchment sheets measuring on average 235x155 mm, or 9.25 x 6.1 inches. The manuscript is not complete and its original extent cannot be determined. Because the drawings and captions are oriented in many different directions, the album appears to have been assembled in an ad hoc fashion, as if the individual sheets were not originally intended to be bound together into book form. It is unclear whether it was Villard himself or a later party who assembled and bound the leaves into a book.