Which packaging innovation for religious texts in the 15th century revolutionized access to sacred writings and contributed significantly to the Protestant Reformation?

Throughout history, religious texts have been packaged in various ways to enhance preservation, accessibility, and reverence. From ancient scrolls to modern digital platforms, the packaging of sacred texts reflects both technological advancements and cultural values. This poll explores an interesting fact about a significant innovation in religious text packaging that transformed how people interacted with sacred writings and democratized access to spiritual knowledge.

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Gutenberg's printed Bible with movable type, which dramatically reduced production costs and increased availability
Illuminated manuscript codices with gold leaf, which enhanced the perceived value and sacredness of texts
Leather-bound pocket editions of prayer books, which allowed for personal devotional reading
Scroll cases with ornate seals, which improved preservation and ceremonial presentation of texts