Outer halo of the Milky Way as viewed by PDR1-giants (top, Pristine footprint) and PGS-giants (bottom, Gaia’s all-sky view) at heliocentric distances greater than 40 kpc. The colour map is a density distribution in Galactic coordinates at absolute latitudes greater than 20°. We highlight the significant overdensities that dominate the outer halo and identify their most-likely progenitors. In the top panel, we also show the footprint of the entire Pristine survey in grey. Some of the pixels in the outer halo part of PDR1-giants are larger than the Pristine footprint due to the chosen healpix level.