Over the past 100 years, more than fifty archaeological projects, large and small, have been mounted at Kaminaljuyu. In addition to excavations, scholars such as Alfred Maudslay and Samuel K. Lothrop have recorded sculpture and made maps of the site. In 1925 Manuel Gamio undertook limited excavations, finding deep cultural deposits yielding potsherds and clay figurines from what later was called the "Middle Cultures" of Mesoamerica (from 1500 BC to 150 AD).[4] A decade later, the importance of the site was confirmed when a local football club began cutting away the edges of two inconspicuous mounds to lengthen their practice field, discovering an impressive buried structure. Lic. J. Antonio Villacorta C., the Minister of Public Education in Guatemala City, requested archaeologists Alfred Kidder, Jesse Jennings and Edwin Shook to investigate. Villacorta gave the site its name from a K'iche' word meaning "mounds of the ancestors." Kidder, Jennings, and Shook's monograph, published by the Carnegie Institution of Washington - one of the most important archaeological research entities in the history of Maya scholarship - brought excited attention by scholars to the significance of the SMA. This excitement turned to consensus about the priority of high social and cultural developments in the South when Shook and Kidder published their report on Mound E-III-3,[5] a "Miraflores" mound and the largest known thus far from the site, and which contained seven structures built onion-skin fashion over and around each other through time. Two extraordinarily rich royal tombs were found within the edifices, probably representing consecutive rulers during the "Miraflores" Preclassic apogee of Kaminaljuyu.