Lutèce is the French form of Lutetia, the Roman city where Paris now stands.
The Battle of Agendicum, also known as the Battle of Lutetia, was a conflict during the Gallic War between the Roman Legion and the native Gauls that occurred near Agendicum (now Sens, France) in 52 BC.
# Pierre Assouline: Lutetia, Paris : Gallimard, 2005 (ISBN 2-07-077146-6)
He then went to France, where he was involved in the "Lutetia circle", trying to build a Volksfront against the Hitler régime.