The ancient Olympic Games, held in Olympia, Greece, from at least 776 BCE, were suppressed by Roman Emperor Theodosius I in 393 CE as part of broader efforts to eliminate pagan practices within the Christianized Roman Empire, ending a tradition that had continued for well over a thousand years. The Games remained essentially dormant for roughly fifteen centuries afterward, though the general concept of ancient Greek athletic competition remained part of European classical education and cultural memory.
Pierre de Coubertin, a French aristocrat and educator, became convinced through the 1880s and early 1890s that reviving organized international athletic competition, modeled on the ancient Olympic tradition, could promote international understanding and physical and moral education among youth — a conviction shaped partly by his belief that French society's perceived physical and moral weakness (which he linked to France's defeat in the 1870-71 Franco-Prussian War) could be addressed through the kind of rigorous physical education and competitive sport he'd observed and admired in British schools. Coubertin spent several years promoting his revival idea to often skeptical audiences among European sporting and educational officials, facing genuine doubt about the practicality and value of the proposal, before successfully organizing an international congress in Paris in 1894 that formally established the International Olympic Committee and set the first modern Games for Athens in 1896. That inaugural 1896 Athens Olympics, while modest by later standards — featuring just 14 nations and around 241 athletes, entirely male — proved successful enough to sustain the broader Olympic revival project, leading to the continued, expanding quadrennial Games that have continued (with wartime interruptions) into the present day.