I finished all those historic models the other day, but I forgot to show them to you. From the top, Carolingian, Romanesque, and Gothic.
Carolingian bindings were from before they figured out sewing frames, so they laced one board on, sewed the book, and laced the other board on. Gothic bindings had boards shaped on both sides to accommodate the swell from the sewing. Romanesque bindings happened between these two developments. There is a lot of extra bulk from the thread that has to go somewhere, and better convex than concave so it doesn’t poke out the foredge and get damaged.










