Excavation, exploration and study activity has been intense in recent years.

According to 800zipcodes, JC Tello obtained fruitful results in a campaign conducted in 1933 in the Nepeña valley (coast of the Ancash department), discovering important remains in the pyramids of Puncuri and Cerro Blanco. Numerous Inca buildings in the Cuzco region brought to light in 1933 and 1934 LE Valcárcel, and especially in the citadel of Sacsahuaman, which dominates the ancient capital of the Incas, stone structures of considerable architectural value have appeared.

In and around Tiahuanaco, excavations by Wendell C. Bennett from 1934 to 1936 have revealed architectural and sculptural remains of great interest. Valcárcel and Suárez Polar highlighted in 1934 the importance of the ruins of Churajón, near Arequipa. A new center of culture on the plateau was revealed through the study of the archaeological sites of Pucara by the Tello (see in this App.) And Valcárcel in 1935, while important archaeological explorations in the Utcubamba valley are due to General Louis Langlois in the department of Amazonas.

From 1936 onwards, Rafael Larco Hoyle began a series of interesting archaeological discoveries in the valleys of the department of La Libertad (Mochica, Cupisnique, Salinar, Virú, etc.). The discovery of Sechin by Tello in 1937, while important results crowned the archaeological explorations conducted from 1938 to 1939 by the director of the Ethnological Museum of Monaco, HU Doering, in the valley of Jequetepeque, north coast, and in Pacatnamu, near Pacasmayo (department by Lambayeque).

Excavations were carried out around Arequipa and in the Majes valley in 1941 by Suárez Polar, Morante and Bernedo Málaga, which began to reveal the Arequipeño style.

In 1941-42, the Andean Research Institution began a large-scale archaeological exploration of the coast of Peru, in areas of the northern Sierra (Huamachuco) and of the plateau of Lake Titícaca (Pucara), with notable discoveries and important stratigraphic studies.

In 1942 Axel Wenner Gren financed a scientific expedition led by Paul Fejos to explore the region close to Machu Picchu discovered by Hiram Bingham in 1914; the expedition also highlighted important architectural elements hidden by vegetation, so that the ancient cities, called by Quechua names Sayapatamarca, Puyupatamarca, Wiñayuayna, were revealed in their artistic beauty. In the same year he returned to Peru AL Kroebere, covering the whole coast, systematically studied the discoveries made so far; we should also remember the studies of Wendell C. Bennett, the last studies conducted in Peru (1939-1944) by M. Uhle (see in this App.) and the journey made at the end of 1998 by H. Bingham.

Studies on Peruvian paleoanthropology have been made by Thomas Dale Stewart and MT Neivell. John H. Rowe discovered the Chanapata (Cuzco) field, which sheds light on the pre-Inca style.

The Tello has once again explored the Callejón de Huaylas, the Marañón valley, Cajamarca, Pachacámac, attempting for the first time reconstructions of the ancient structures, finding a stone of evident Inca style. He tried to save the contents of the huacas (pyramids) of Lima, which had been demolished for urban development and took care of the transport of the archaeological remains of the great necropolis of Ancón, which began in 1946.

In 1946 the Andean Research Institution, in union with the universities of Yale and Columbia and with the Natural History Museums of New York and Field of Chicago, carried out very important scientific work. With the active collaboration of the Institute of ethnological studies of Lima, the Smithsonian Institution has implemented the “plan of Virú” (where all the archaeological, geographical and ethnological research was concentrated), arriving at notable discoveries. M. Reichlen of the Musée de l’Homme in Paris began explorations in the Cajamarca valley in 1947 with magnificent results.