Which packaging innovation for religious texts was specifically designed to make scriptures more accessible to the masses and is credited with helping spread religious literacy in the 15th century?

The presentation and packaging of religious texts has evolved significantly throughout history, reflecting both technological advancements and theological considerations. From ancient scrolls to modern digital formats, the way sacred texts are presented affects how they're accessed, interpreted, and revered. This trivia question explores an interesting aspect of religious text packaging that transformed accessibility and spiritual practice in different faith traditions.

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The Gutenberg Bible's mass-produced movable type printing
The development of pocket-sized prayer books with leather binding
The introduction of gold-leaf illuminated manuscripts
The creation of scroll storage boxes with decorative exteriors