This workshop is a multi-disciplinary gathering of mathematicians, physicists and chemists aiming to discuss the current theoretical and computational state-of-the-art of many-body electronic structure calculations for solids. While Kohn-Sham density functional theory models are the workhorse of solid-state electronic structure calculations, many-body approaches are required when studying materials such as multiferroics, Mott insulators, and high-temperature superconductors in which electronic correlations play an important role.