PHerc. 1667, a carbonized scroll sealed since Mount Vesuvius erupted in 79 AD, has been completely read for the first time without physical unrolling. The Herculaneum papyri survived the volcanic disaster but remained unreadable because opening them destroys their contents. This breakthrough marks the first full digital reconstruction and transcription of an entire ancient philosophical text from the sealed collection.

Researchers used phase-contrast X-ray microtomography at the European Synchrotron Radiation Facility in Grenoble to scan the scroll's internal structure. They reconstructed the spiral geometry, flattened the virtual papyrus surface, and trained machine learning models to detect faint ink traces against carbonized material. The method proved scalable and verifiable, with independent confirmation on a second scroll showing identical results to previous readings.

The recovered text reveals a Stoic philosophical treatise focused on ethics, human nature, and moral progress. Its final column names Aristocreon, nephew of philosopher Chrysippus, dating the work to the 2nd century BC. Fragmentary passages discuss inquiry, practical wisdom, and the nature of good and evil, offering new insights into ancient philosophical thought.

All data, transcriptions, and code are openly available through scrollprize.org/data and GitHub under Creative Commons licensing. The project emerged from the public Vesuvius Challenge competition, where global participants won prizes for early breakthroughs before joining the research team. Hundreds of scrolls remain sealed, making this virtual unwrapping technique crucial for accessing an entire lost library of ancient literature.