The aim of disputes over property looted during the National Socialist era is to find a 'just and fair solution'. But what are 'just and fair solutions'? And how do you investigate cases of Nazi-looted property? This new kind of publication presents approaches to such cases and the development of solutions. 'Alternate history' elements such as Leonardo da Vinci's "Formula of Invisibility", Antonio Vivaldi's composition "The Five Seasons", or a map from 1506, which mentions a new continent called "America" for the first time are starting points for examining and resolving the cases. The Venetian cases thus provide bridges between art, history, law and ethics. They are accompanied by aspects and models of solutions, as well as a sample restitution agreement.