Magnetic Fields in the Early Universe -- Magnetic Fields in Galaxy Systems, Clusters and Beyond -- Magnetic Fields in Galaxies -- The Origin of Galactic Magnetic Fields -- Magnetic Fields in the Milky Way, Derived from Radio Continuum Observations and Faraday Rotation Studies -- Mesoscale Magnetic Structures in Spiral Galaxies -- Magnetic Fields in Diffuse HI and Molecular Clouds -- Stellar Mag…