Which packaging innovation for religious texts first emerged in the 4th century CE and revolutionized how sacred writings were accessed and preserved?

Throughout history, religious texts have undergone fascinating transformations in how they're packaged and presented to believers. From ancient scrolls to digital apps, the 'packaging' of sacred writings reflects both technological advancement and changing spiritual practices. This poll tests your knowledge about how religious products have been marketed and delivered to followers across different faith traditions and historical periods.

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The codex (bound book format)
Illuminated manuscripts with gold leaf
Mass-produced scrolls on papyrus
Clay tablet collections in wooden cases