Among all the observational techniques used in astronomy, polarimetry has been fundamental to determine the nature, geometry and physical mechanisms of Active Galactic Nuclei (AGN). Polarimetry, either using broadband filters, spectroscopy, timing information, or imaging capabilities, has made history by unveiling the importance of the nucleus inclination in the vast zoology of quasi-stellar objects. Polarimetry revealed the physical origin of the featureless continuum, constrained the magnetic field intensity and topology in jets, detected strong and asymmetrical outflows from the inner AGN region, exposed the alignment of quasar polarization with large-scale structures and continues providing new information on the morphology and chemistry of extra-galactic dust. However, despite these great advances, the panchromatic polarization of AGN is far from being understood. The principal reason is the fact that radio measurements are restricted to narrow bands, infrared polarimeters are scarce, and high energy data (far ultraviolet, X- and gamma-rays) are simply missing.

The upcoming era of gigantic radio arrays (SKA, HERA, ngVLA), millimeter dishes (ALMA, EHT, AtLAST), large-class ground-based and space born telescopes (JWST, LSST, ELT, SPICA) and high energy polarimeters in space (IXPE, eXTP, LUVOIR/POLLUX) indicates that this is the perfect time to meet and gather all the recent AGN polarization discoveries. This conference is meant to summarize our current understanding of the panchromatic polarization signatures in AGN from observations and modeling, determine the best strategy to fill our knowledge gaps, learn about the new generation of instruments that could be beneficial to the field and make a strong case for the inclusion of polarimeters in any new observatory.