archaeological research academically. During the 1930s, he discovered many distinct Peruvian cultures such as Viru, Salinar, Cupisnique, and Lambayeque. The focus of his research became the Mochica culture. In 1946, Larco Hoyle, director of the Larco Museum, developed the first Peruvian chronology of ancient cultures, one that has remained current. Archaeological contributions Discovery of the archeological site of Cupisnique (1933). Discovery of the Virú culture in the cemeteries of Pampa de los Cocos and Pampa de Moche (1933). Discovery of Queneto and its ceramics (1934). Discovery of the pre- Cupisnique ceramics (1939). Discovery of the Cupisnique culture (1939). Discovery of the cemeteries containing ceramics called Cupisnique de Santa Ana and the culture of the same name (1939). Discovery of the cemeteries containing ceramics called Cupisnique de Santa Ana and the culture of the same name (1939). Discovery of tombs with hybrid ceramics Mochica - Virú (1940). Discovery of the Salinar culture (1941). Opening of the first tomb in the valley of Virú and find of the hybrid cemeteries called by him Virú - Cupisnique. Discovery of the hybrid vases Salinar - Cupisnique in the valley of Virú. Discovery of lithic tools used by the hunters in the Pre- Ceramics Age (pampas of Paiján and Cupisnique). Find of the vases of the Virú culture in the valleys of Chicama, Santa Catalina, Santa, Pacasmayo, Lambayeque and Piura. Discovery of the Virú vases, with positive ornamentation and called by him Virú of Chicama. Discovery of the Pacopampa ruins from the Evolutionary Age and of tools of the culture that existed there. Discovery of the pre - Mochica phase, called Complex Mochica or Initial Mochica. Find of tombs with orange vases and its relation with Virú vases, previous to Mochica. Find of the superimposed tombs and stratifications that allowed him to sort the five Mochica periods. Discovery of Barbacoa of Cupisnique, Salinar, Virú and Mochica superimposed tombs that resulted in the determination, for the first time, of the chronological order of the pre - Mochica cultures. Discovery of the fact that the Huari culture, called Tiahuanaco, spread all over the Peruvian territory and that its center was not Tiahuanaco but Huari in Ayacucho. Discovery and declaration of the existence of the Lambayeque culture which is sorted into two periods : Lambayeque I and II, and the Huari - Lambayeque culture, distinguishing the Chimú culture from the Lambayeque culture. Explanation of why it was not