contains the personal papers of the San Marcos educator Raúl Porras Barrenechea, his research files, letters, ballot papers, notebooks, notebooks and notes, publications, and original texts of his written production, a documentary set that constitutes the Porras Archive. The Melitón Porras Archive and part of the José Gálvez Archive, handed over by his heirs, are also preserved in this location. Museum of Natural History Library: The "Javier Prado" Museum of Natural History has collections of enormous historical value in its library, which are the product of important naturalists such as Antonio Raimondi, Augusto Weberbauer, María Koepcke, among others. These collections make the library and the museum important information centers on Peruvian biodiversity — flora, fauna, and geology. Temple-Radicati Library: It is part of the “Temple-Radicati” Library-Museum Foundation, which was established in 1996 thanks to donations from Ella Dunbar Temple Aguilar de Radicati and Carlo Radicati di Primeglio. The collection is made up of Spanish and Italian encyclopedias, dictionaries, books on history, geography, sociology, literature and various novels, law, art, archaeology, etc. Collections and manuscripts Through its "Domingo Angulo" Historical Archive, the National University of San Marcos preserves copies of documents and writings of great historical relevance dating from the 16th, 17th, 18th, and 19th centuries, such as the Royal Provision and the Royal Decree of Emperor Carlos I of Spain and V of the Holy Roman Germanic Empire of May 12, 1551, and the papal bull Exponi Nobis of Pius V of July 25, 1571, with which the constitution of the University of San Marcos as the first university in the American continent. In 2019, the “Colonial Fund and Founding Documents of the National University of San Marcos: 1551 -1852” was incorporated into the UNESCO Memory of the World Register, in recognition of its significance for global collective memory. Various institutions of the University of San Marcos such as the Central Library, the Museum of Natural History, the Archeology and Anthropology Museum, and the Raúl Porras Barrenechea Institute, among others, also have what were private collections and manuscripts of illustrious San Marcos people who left as a legacy to his university; works by authors and researchers such as César Vallejo, José María Arguedas, Raúl Porras Barrenechea, Ella Dunbar Temple, Julio César Tello, Antonio Raimondi, etc. These manuscripts and collections are kept by the University of San Marcos and entrusted to the corresponding university dependency according to their historical and scientific