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On May 29, 1919, at Ro\c{c}a Sundy, Principe island, Eddington confirmsEinstein's general relativity theory for the first time by photographing starsbehind the obscured Sun during a total eclipse. History was made. At Sobral,Eddington's astronomer colleagues photograph the same eclipse and also concludethat light from distant stars suffers a deflection when passing by thegravitational field of the Sun, in accordance with general relativity. With theconfirmation of general relativity, a theory of gravitation at a fundamentallevel, physics became, once and for all, relativist and its future wasoutlined. The first world war had finished a few months before and the deepwounds between nations were yet to heal. Science wanted to be above it allshowing that people could be united by a common goal. This year, the 100 yearsof this achievement was commemorated with the scientific conference "FromEinstein and Eddington to LIGO: 100 years of gravitational light deflection" inPrincipe to celebrate this landmark event. We report here on this conference ofcelebration.

Einstein and Eddington and the eclipse in Principe: Celebration and science 100 years after