thumb|250px|Papyrus Oxyrhynchus 3929, a libellus from the [[Decian persecution, found in Oxyrhynchus in Egypt.]] A libellus (plural libelli) in the Roman Empire was any brief document written on individual pages (as opposed to scrolls or tablets), particularly official documents issued by governmental authorities.
thumb|250px|Papyrus Oxyrhynchus 3929, a libellus from the [[Decian persecution, found in Oxyrhynchus in Egypt.]] A libellus (plural libelli) in the Roman Empire was any brief document written on individual pages (as opposed to scrolls or tablets), particularly official documents issued by governmental authorities.
The term libellus has particular historical significance for the libelli that were issued during the reign of Emperor Decius to citizens to certify performance of required pagan sacrifices in order to demonstrate loyalty to the authorities of the Roman Empire. During later periods libelli were issued as certificates of indulgence, in which the confessors or martyrs interceded for apostate Christians.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).