Lucius Petrus Dextrus

Lucius Petrus Dextrus (Latin: "Shining Rocky Right-hand") was an augur who lived in Pompeii in 79 AD.

Biography
Lucius visited the Caecilius family on the day before the eruption of Mount Vesuvius, obtaining part of a marble energy converter designed by the Pyroviles from Lucius Caecilius Iucundus. Under the direction of the Pyroviles, he slowly collected the pieces to build the converter to be placed inside the heart of Mount Vesuvius in order to convert the population of the world into more Pyroviles.

The Tenth Doctor and Caecilius' son Quintus found out that he had breathed in the dust of Mount Vesuvius, actually the remains of the Pyroviles, which was slowly transforming him into stone. The Doctor broke his arm off and escaped, along with Quintus. Later the High Priestess ordered him to advance the prophecy, and in Mount Vesuvius he presented the energy converter to the Pyroviles. The Doctor and Donna caused the eruption of Mount Vesuvius erupted, killing the Pyroviles and Lucius inside it, along with the converter and the rest of Pompeii.

He was involved with the Cult of Vulcan. (DW: The Fires of Pompeii)