Part I: At the limits of the classical worldview. Theories of gravitation in the twilight of classical physics / Jürgen Renn and Matthias Schemmel ; The Newtonian theory of light propagation / Jean Eisenstaedt ; Mach and Einstein, or, clearing troubled waters in the history of science / Gereon Wolters -- Part II: Contexts of the relativity revolution. Tilling the seedbed of Einstein's politics : a pre-1905 harbinger? / Robert Schulmann ; The early reception of Einstein's relativity among British philosophers / José M. Sánchez-Ron ; Science and ideology in Einstein's visit to South America in 1925 / Alfredo Tiomno Tolmasquim ; The reception of Einstein's relativity theories in literature and the arts (1920-1950) / Hubert F. Goenner -- Part III: The emergence of the relativisticworldview. Hilbert's axiomatic method and his "foundations of physics" : reconciling causality with the axiom of general invariance / Katherine A. Brading and Thomas A. Ryckman ; Not only because of theory : Dyson, Eddington, and the competing myths of the 1919 Eclipse Expedition / Daniel Kennefick ; Peter Havas (1916-2004) / Hubert F. Goenner ; Peter Bergmann and the invention of constrained Hamiltonian dynamics / D.C. Salisbury ; Thoughts about a conceptual framework for relativistic gravity / Bernard F. Schutz -- Part IV: A new worldview in the making. Observational tests of general relativity : an historical look at measurements prior to the advent of modern space-borne instruments / J.E. Beckman ; Primordial magnetic fields and cosmic microwave background / Eduardo Battaner and Estrella Florido ; Singularity theorems in general relativity : achievements and open questions / José M.M. Senovilla ; The history and present status of quantum field theory in curved spacetime / Robert M. Wald ; The border between relativity and quantum theory / Tevian Dray ; The issue of the beginning in quantum gravity / Abhay Ashtekar.