National archives are institutions that preserve and manage a country's historical documents and records. These archives collect important materials, such as government documents, photographs, and personal papers, to ensure that the nation's history is accessible to the public. They play a crucial role in maintaining the cultural heritage and identity of a country. In many countries, national archives also provide resources for researchers, historians, and the general public. They often offer online databases and physical access to documents, allowing people to explore their nation's past. Examples of national archives include the National Archives and Records Administration in the United States and the National Archives in the United Kingdom.