Despite the development and success of thermodynamics over centuries, many basic questions are still open. The gaps in the current understanding of thermodynamics become particularly relevant when it is applied to the study of systems at the nanoscale. We are a network of researchers from 32 different countries, mainly in Europe. Our goal is to significantly advance the theory of foundational thermodynamics, with a focus on its applicability in the nanoscale regime, and pursue quantum thermodynamics experiments. This network is funded by the COST framework for European Cooperation in Science and Technology (Action MP1209).