Which religious product innovation strategy was pioneered by the Catholic Church in the Middle Ages that fundamentally changed how religious texts were accessed?

Throughout history, religious institutions have been both spiritual centers and product innovators. From ancient prayer scrolls to modern meditation apps, the evolution of religious products reflects changing societal needs while preserving core values. This poll explores a fascinating aspect of how religious product development has adapted to serve communities across centuries. Test your knowledge about the intersection of faith traditions and product innovation!

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The codex format (bound books) replacing scrolls, making religious texts more accessible and easier to reference
Subscription-based prayer services where monasteries would pray for paying patrons
Direct-to-consumer selling of blessed items, bypassing local clergy as intermediaries
Virtual prayer experiences through early optical illusions in cathedral windows