When the Romans took control of Greece, a number of different solutions were tried. Julius Caesar foresaw the advantages of a link for his newly built Colonia Laus Iulia Corinthiensis. By the reign of Tiberius, engineers tried to dig a canal, but were defeated by lack of modern equipment. Instead they built an Ancient Egyptian device: boats were rolled across the isthmus on logs, as the Egyptians had rolled blocks of granite to make their pyramids. This was in use by AD 32. In AD 67, the philhellene Roman emperor Nero ordered 6,000 slaves to dig a canal with spades. Historian Flavius Josephus writes that the 6,000 slaves were Jewish pirates, taken captive by Vespasian during the Jewish wars. According to Pliny the Elder, the work advanced four stadia (about 0.8 kilometers). The following year Nero died, and his successor Galba abandoned the project as being too expensive.