Karl Schwarzschild Lecture: Singularities, Horizons, Firewalls, and Local Conformal Symmetry: Gerard 't Hooft -- Panel Discussion, "The Duel": The Good, the Bad, and the Ugly of Gravity and Information: Gerard 't Hooft, Steven B. Giddings, Carlo Rovelli, Piero Nicolini, Jonas Mureika, Matthias Kaminski and Marcus Bleicher -- Part I Black Holes in Classical General Relativity, Numerical Relativity, Astrophysics, Cosmology and Alternative Theories of Gravity -- A Menagerie of Hairy Black Holes: Elizabeth Winstanley -- Black Holes Sourced by a Massless Scalar: Mariano Cadoni and Edgardo Franzin -- Rotating Black Hole Solutions in f (R)-Gravity: Mariafelicia De Laurentis and Ruben Farinelli -- Symplectic structure of extremal black holes: Kamal Hajian, Ali Seraj -- The Causal Nature of Trapping Horizons: Ilia Musco, Alexis Helou and John C. Miller -- Einstein-Charged Scalar Field Theory: Black Hole Solutions and Their Stability: Supakchai Ponglertsakul, Sam Dolan and Elizabeth Winstanley -- The good properties of Schwarzschild's singularity: Ovidiu Cristinel Stoica -- Part II Black Holes in Quantum Gravity and String Theory -- Quantum Black Holes as the Link Between Microphysics and Macrophysics: B. J. Carr -- Free Energy of Topologically Massive Gravity and Flat Space Holography: Daniel Grumiller and Wout Merbis -- Super-Entropic Black Holes: Robert B. Mann -- Aspects of Quantum Chaos Inside Black Holes: Andrea Addazi -- Black Hole Entropy in the Presence of Chern-Simons Term and Holography: Tatsuo Azeyanagi -- A Quantum Cosmic Conjecture: Roberto Casadio and Octavian Micu -- Phase transitions of regular Schwarzschild-Anti-deSitter black holes: Antonia Micol Frassino -- Thermal Corpuscular Black Holes: Andrea Giugno -- Generalized uncertainty principle and extra dimensions: Sven Köppel, Marco Knipfer, Maximilano Isi, Jonas Mureika, Piero Nicolini -- Perihelion Precession and Generalized Uncertainty Principle: Fabio Scardigli and Roberto Casadio -- Quantum-gravity phenomenology with primordial black holes: F. Vidotto, A. Barrau, B. Bolliet, M. Schutten and C. Weimer -- Part III Other Topics in Contemporary Gravitation -- Self Sustained Traversable Phantom Wormholes and Gravity's Rainbow: Remo Garattini -- Cosmology via Metric-Independent Volume-Form Dynamics: Eduardo Guendelman, Emil Nissimov and Svetlana Pacheva -- Testing General Relativity on Accelerators: Tigran Kalaydzhyan -- Size Scaling of Self Gravitating Polymers and Strings: Shoichi Kawamoto and Toshihiro Matsuo -- The Hot and Dense QCD Equation of State in Heavy Ion Collisions and Neutron Star Mergers: Jan Steinheimer, Ayon Mukherjee, Natascha Wechselberger, Matthias Hanauske, Stefan Schramm and Horst Stöcker.