experimented
with the format. At that time, the roll (also called a
scroll) was the dominant medium for literary works
and would remain dominant for secular works until the
4th century. As far back as the early
2nd century, there is evidence that the codex was
the preferred format among
Christians, while
pagans preferred the roll. The Christian codex was
made of
papyrus, more compact and better suited for people
on the move than
parchment. This Christian revolution in media lies
at the beginning of the history of the modern book at
the juncture between pagan
oral culture and one based firmly on written text.
From the 4th century, when the codex gained wide
acceptance to the
Carolingian Revival in the
8th century many works were not converted from
scroll to codex and were lost to posterity. The
designation Codex is less used in conventional
names given Medieval manuscripts, when the codex form is
universal and understood.
The correct Latin plural is codices, although codexes is also often used as a plural form in English. The codex was an improvement over the scroll, because it can be opened flat at any page, allowing easier reading, and pages can be written on both sides. The ability to number pages allowed for cross references to be made more easily. This was important to the early Christian writers who wanted to cross reference biblical texts when looking for evidence that Jesus's life fulfilled biblical prophesy.
The codex also made it easier to organize documents in a library because it had a stable spine on which the title of the book could be written, and later read when books were arranged upright on shelves. The spine could be used for the incipit, before the concept of a proper title was developed, during medieval times.
Medieval book makers used parchment or vellum for their pages, which made them very durable, but extremely expensive. Early codices were made also made from papyrus, however papyrus is too fragile to be repeatedly folded. The scholarly study of manuscripts from the point of view of book-making is called codicology. The study of ancient documents in general is called paleography.
The books of Pre-Columbian Mesoamerica had basically the same form, with long folded strips of paper (usually made from either wood bark or plant fibers, often with a layer of whitewash applied before writing), hence the ancient books of the Maya, Aztec, and Mixtec peoples, among others, are also known as codices. See also: Maya codices.
A legal text or code of conduct is sometimes called a codex (for example, the Justinian Codex), since laws were recorded in large codices.
Some codices
Codices are usually named for their most famous resting-place, whether a city or a private library. An example of a somewhat later codex than these would be the Leningrad Codexs.