Are these depictions of ancient Greek and Roman libraries "scroll-shelves" historically accurate?

Question

In some modern depictions of ancient Greek and Roman libraries or studies, I sometimes see shelving units specifically designed for scrolls.

These feature cubby-hole style compartments of squarish slots where scrolls are neatly arranged. These cubby-hole compartments often have a very specific shape, resembling squares rotated by 45 degrees, creating a diamond-like appearance. Sometimes these sections are also sectioned horizontally.

Here are some pictures for clarity:

I'm curious about the historical accuracy of these "scroll-shelves." Specifically:

• Is there any archaeological evidence for such shelving units in ancient Greek or Roman contexts?

• If these depictions are not historically accurate, how were scrolls typically stored and organized in ancient Greek and Roman libraries?

• When and why did the concept of these "scroll-shelves" emerge in popular depictions of the ancient world?

Answer 1

At the Villa of the Papyri in Herculanium, 1,500 ancient scrolls have been found, covered by the Eruption of Vesuvius in 79.

At the time of the eruption of Vesuvius in AD 79, the valuable library was packed in cases ready to be moved to safety when it was overtaken by a pyroclastic flow; the eruption eventually deposited some 20–25 m of volcanic ash over the site, charring the scrolls but preserving them – the only surviving library of Antiquity – as the ash hardened to form tuff.1

https://en.wikipedia.org/wiki/Villa_of_the_Papyri#Epicureanism_and_the_library

This says nothing about how the scrolls were normally stored when not being moved.

But this says:

In the living quarters, bath installations were brought to light, and the library of rolled and carbonised papyri placed inside wooden capsae, some of them on ordinary wooden shelves and around the walls and some on the two sides of a set of shelves in the middle of the room.1

https://en.wikipedia.org/wiki/Villa_of_the_Papyri#Layout

So this suggests there were shelves of some type in the library.

https://www.jstor.org/stable/25542290

Answer 2

Designs were varied, just like today. Search for specific designs of:

1. Armaria: wooden cupboards or cabinets with multiple shelves. Scrolls were placed horizontally on the shelves. The armaria were often placed against the walls of the library. Designs vary.
2. Niches: the famous Library of Celsus in Ephesus had wall niches to store the scrolls.
3. Capsores or capsa: cylindrical boxes used for transporting but also storing individual scrolls.

For references see:

1. Casson, Lionel. Libraries in the Ancient World. Yale University Press, 2001.
2. Johnson, Elmer D. History of Libraries in the Western World. Scarecrow Press, 2001.
3. http://ancientcataloging.weebly.com/rome.html