For almost two thousand years, the carbonised papyri of Herculaneum have preserved a wealth of knowledge that remained inaccessible. After surviving the Vesuvius eruption in 79 AD, these valuable writings could not be opened without being destroyed. Today, thanks to the multinational Vesuvius Challenge initiative, this limitation has been addressed. For the first time, the scroll from Herculaneum's famous library, PHerc. 1667 (also known as Roll 4), has been totally digitally unrolled and read virtually, without ever physically opening the delicate papyrus, allowing for scientific examination. This result was obtained by combining ultra-high-resolution X-ray tomography, three-dimensional reconstruction, and artificial intelligence algorithms capable of differentiating even the smallest remnants of ink from charred papyrus. After digitally rebuilding the scroll's internal layers, the surfaces were virtually "flattened" to produce legible pages that were then transcribed and validated by papyrologists. PHerc. 1667 is the fragments of a much larger text. Attempts to open it manually between the 19th and 1980s damaged much of the outer layers, leaving only a compact core roughly eight centimeters high, as opposed to the original 19-24 centimeters. Despite the deterioration, academics were able to reconstruct the preserved text of roughly twenty-two columns.