The Sixteenth Object is the only one to regularly be named in discussion with something other than its place in the Revised Clementine Sequence, so for the convenience of the reader, I will call it by its imprecise but popular name: the Toscaria Codex.
The Toscaria Codex is famous, of course, for the shadowy intrigues eventually won by a maga of that name in 1491, when she recollected all of the pages, after a series of duels, wars and adventures which are the stuff of fiction devoured by apprentices. Toscaria herself retains ownership of the Codex, and reserves the right to use it at her discretion, but has allowed it to be stored in the New Academy since her victory.
Physically the Toscaria Codex is a book of linen paper, with boards made of cerulean wood. The boards are covered in cloth, which appears to be golden spider silk from Africa, and a design of an angel is pressed into the cover, possibly using xylographic printing.
The pages are collected in gathers, and were originally bound to the cover with the ankle sinews of a dragon. This contained vis, and was removed by Haralda (upon whom the character of The Desecrator is loosely based) before he scattered the pages throughout the Order. Toscaria has replaced these twice : once when she gathered the pages together, and again after a series of experiments on the Object. Some researchers wished to know if the new binding, which seemed to be immune to magic, had gained the properties of an Object, or was merely being shielded by its enclosure in the Codex. Neither is true: the sinews containing vis had transformed into succursus, and were gradually being dissolved by the spells cast, ineffectually, against them.
The Toscaria Codex, or each of its separated pages, extends immunity to magical effects, as most of the Objects do, but in a way considered highly useful by the owners of the various portions. Many magi have flaws in their Gifts, or training, which causes supernatural obstructions in their ability to cast the minor magics required in a laboratory to learn spells. Many Bjornaer magi, for example, are cursed with great difficulty when learning fire magic. The Toscaria Codex removes these obstructions for those learning spells written on its pages. Each page contains a single Formulaic working, and there are 216 pages. This discounts rumours that eight pages, claimed burned by Toscaria’s final rival, still exist.
The similarity of this object to the Twenty-Ninth is so marked it is clear they were bound for the same library.