Nicolas Viton de Saint-Allais was a French genealogist and historian, best known for his monumental work, "Nobiliaire universel de France," a comprehensive collection of the genealogies of noble families in France. Born in 1773, Saint-Allais dedicated much of his life to the meticulous documentation of the aristocracy, reflecting the historical significance of lineage and heritage during a time of social upheaval in France. His extensive research and detailed accounts provided invaluable insights into the noble classes, particularly during the transitional period following the French Revolution. The "Nobiliaire universel de France" stands out not only for its breadth but also for its role in preserving the history of French nobility at a time when many aristocratic traditions were being challenged. Saint-Allais's work has been recognized for its thoroughness and accuracy, making it a critical resource for historians and genealogists alike. His legacy endures through this significant contribution to the understanding of French noble lineages, ensuring that the complexities of aristocratic heritage are documented for future generations. Saint-Allais passed away in 1842, leaving behind a lasting impact on the fields of genealogy and historical research.