the conquest of Gaul, Caesar came to Lutetia and met with the leaders of the Gallic tribes. They agreed to submit to Rome, but then almost immediately rebelled. Caesar sent one of his generals, Titus Labienus, to subdue the Parisii. The Parisii burned the bridges to prevent his passage, but they were outmaneuvered and defeated in battle on the Plain of Auteuil. An academic debate about the original location of Lutetia began in 2006, following the excavation in 1994–2005 of a large Gallic necropolis, with residences and temples, at Nanterre, along the Seine in the Paris suburbs. Some historians have put forward this settlement at Nanterre as the Lutetia of the Gauls, rather than Île de la Cité. Other historians point out that Caesar described "Lutetia, fortress ('oppidum') of the Parisii, situated on an island." They say that the absence of traces of pre-Roman settlement discovered so far on Île de la Cité is due primarily to the continuous building and rebuilding on the island over the centuries. After the conquest of the Parisii, the Roman town of Lutetia developed mainly on the Left Bank, where the temples and baths were located. However, in the 3rd century AD, a series of invasions by Germanic tribes began; the Roman town on the left bank was sacked in 275–76. Afterwards, the left bank was largely abandoned. Beginning in 307 AD, the forum, amphitheater, and other structures were demolished and the stone was used to construct a rampart around the island, as well as to construct new buildings. The stone wall was not very high - only about two meters - but was apparently topped by a further wooden palisade. The island became an important defensive position on the northern flank of the Roman Empire. In 451, during the late Roman Empire, when the Huns occupied the left bank, Saint Genevieve led the defence of the city from the island. The Roman Emperor Julian, residing in Gaul from 355 to 361, described "a small island lying in the river; a wall entirely surrounds it, and wooden bridges lead to it on both sides." At what was then the western end of the island was the residence of the Roman governor, near the present Palais de Justice. It was described as a "Palace", but appears to have been a very modest residence. The Roman also built a new wharf, where the Parvis Notre-Dame –