During the low water mark period, general relativity was not fashionable for much a physicist and a limited number of articles were published. The perihelion of Mercury was the essential test to secure the theory; a neo-newtonian interpretation dominated. Einstein's theory of gravitation was generaly considered as a mathematical theory. Relativists were isolated. In this context, I will insist on the limited actual physical results of the theory, on the main questions to be solved, and on the ways that were to lead to the renewal: cosmology, black-holes and astrophysics.

The year 2015 marked the 100th anniversary of Einstein's field equations. To celebrate this event, the Max Planck Institute for Gravitational Physics (or Albert Einstein Institute) hosted a conference during the week of November 30, 2015, exactly one hundred years after the publication of Einstein's paper. The conference took place in the recently renovated Harnack House, where Albert Einstein regularly lectured between 1915 and 1931.The first two days of the conference (Monday November 30 and Tuesday December 1) devoted to a review of recent developments in and future perspectives for General Relativity and its connections to particle physics, cosmology and astrophysics. The third day (Wednesday December 2) was a joint event with the Max Planck Institute for the History of Science, with talks on the past, present and future of General Relativity.

On December 3-5 the Max Planck Institute for the History of Science concluded the celebratory events with a workshop on the history of Einstein's theory titled "**The "Renaissance" of General Relativity: Assessing Einsteins's Legacy in Post-World War II Physics**."