To close the end of summer and the "Summer in the City" programme, the Luxembourg City Tourist Office organises a series of free concerts in collaboration with artists from the QuattroPole cities, namely Luxembourg, Metz, Trier and Saarbrucken. This year’s highlight will be the free charity concert given by Lura at Place Guillaume in favour of the campaign "Solidarity for Change" organized by SOS Villages d'Enfants Monde.