FORMATIVE ROOM The Formative Period comprises the years from 2000 to 200 B.C., its origins reach back in time to the domestication of plants and animals in the Late Archaic (3000 - 2000 B.C.), marking the later development of civilization in the central Andes. Technological development achieved great magnificence with the rise of pottery, weaving, metallurgy and irrigated agriculture. This technology was sustained by regional integration based on an efficient religious ideology. This is an explanation of the presence of grand, ostentatious ceremonial centers for satisfying the needs of the growing population. One of the most important   ceremonial centers was Chavín de Huantar, which arose 1200 years after the beginning of the Formative. Chavín must have been the most successful cohesive element of its time, bringing together architectural patterns from different geographical regions. In this new museographic guide of the Formative Room, data have been included from the latest research and discoveries made by the Chavín de Huantar Project of Stanford University, which has been carrying on studies of the site for several years, making new finds such as the group of strombus or "conch shells", located in the gallery of the same name, as well as the dating which has been corrected according to new information. Likewise, museographic resources such as recreations have been used to produce reactions in the visitor. This is the case with the access to the space where the Tello Obelisk is found: an entrance with stone walls was recreated on which four replicas of the stone cabezas clavas ("nail heads"), were placed, the originals having been lost in the mudslide of Ranrayrca. Without a doubt passing through this room is an imaginary trip back into the past.