The 23rd World Philosophy Conference will be held August 4-10, 2013 in Athen.
According to the tentative program Jürgen Habermas will participate in a session on "Cosmopolitanism", chaired by Noriko Hashimoto, the Aoyama Gakuin University, Japan. David Rasmussen (Boston) and Arne Johan Vetlesen (Oslo) will also take part in the session.
More information on the conference here.
Pictures from Habermas's lecture in Athen here.