The sessions will be held in both the Pantheon and the Sorbonne. Most of the hotels are very close to this area. Following are a few maps that you may find handy.
The first shows the area around the Sorbonne and Pantheon and is not bad if you zoom in. Street names are legible. The second shows a slightly bigger area. The third is from the metro maps, RATP, and shows the area in front of the Pantheon, including the Sorbonne.