Licence attribution

This work, "photoserver9", is a derivative of "eso1253a" by ESO, used under CC BY 4.0.

This work, "réseau complexe7", is a derivative of "8273922515" by Andy Lamb, used under CC BY 2.0.

This work, "Lyon by Night3", is a derivative of "Lyon by Night - Les quais de Saône la nuit de la fête de lumière" by Jitrixis, used under CC BY 4.0.