Argentina created its National Immigration Archives on 13 January 1920 to preserve records of millions of arrivals. The institution collected ship manifests, personal documents, and settlement records. These archives helped scholars study migration patterns that shaped Argentina’s population. The project also supported government efforts to organize social services for newcomers. Its records reveal cultural, linguistic, and occupational diversity brought by immigrants. Over the years, the archives became a crucial resource for genealogical research. They continue to support historical and demographic studies today.