The working group on Spin Physics at the XXIV International
Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2016)
witnessed a significant progress in the theoretical and experimental
investigations aiming at unveiling the innermost structure of the proton.
Results ranged from proton's one-dimensional representation to its
multi-dimensional imaging. In this contribution, we summarize a selection
of the topics discussed and of the results presented. For details,
we refer to the individual contributions collected in the proceedings of