A collection or index of papal bulls (official documents sealed with the papal seal); an archival compilation of papal decrees.
Medieval Latin 'bullaria' from 'bulla' (papal seal, sealed document) plus '-aria' (collection or place). Used in ecclesiastical contexts.
Medieval archivists needed to organize thousands of sealed papal documents, so they created 'bullaria'—the word shows how even bureaucracy generates its own vocabulary when systems grow complex enough!
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