In contrast to the Aztecs and the Maya, the ancient Purépechans left little monumental architecture. Towns were not fortified in any significant way, and roads had little if any paving. Only two
ball courts are known in the area of the old empire and neither is in the capital. Until relatively recently, archeologists, anthropologists and historians had little interest in these people. There was even doubt that the Purépechans ever had a state society. However, recent investigations have revealed that the ancient Purépecha had a vast empire, second in territory only to the Aztecs and a complex culture that was in many ways unlike any other in Mesoamerica. The first fieldwork here was that of Nicolas León in 1888. He outlined the basic characteristics of the buildings and gave a brief history of the site, emphasizing the events that led to the ancient city's destruction. However, no excavations took place at the site until the 1930s. The area that is now open to the public is the first area to be excavated and reconstructed at the end of the 1930s. In 1930, Caso and Noguera began the first formal excavation in Tzintzuntzan. Their work proved difficult because of the composition of the soil, which made identifying the strata of the site and its chronology difficult. In 1937, a series of eleven seasons of work at the site began to clean the site, consolidate it and reconstruct the main architectural elements. Other studies took place alongside this work. This work was headed by
Alfonso Caso and focused on
Yácata Number 5, as well as the consolidation of the north end of the line of
yácatas. During the 1938 season, further consolidation was undertaken as well as the excavation of burials and the attempt to establish a chronology of occupation via layers.
Yácata 5 was cleaned, as well as Building A (from colonial times) and Building B was discovered. From 1940 to 1946,
Yácata 5 was finished, and Buildings B and C were excavated. Topographical and strata studies were undertaken in support of the study of ceramics here. Excavation of burials was completed, and the rectangular area between
Yácatas 4 and 5 was investigated, as well as the rectangular area by
Yácata 1. From 1962 to 1968, the area was explored by Dr. Piña Chan. The front of
Yácata 1 and the wall delimiting the Grand Platform were reconstructed. A colonial-era building was discovered (Building D), an altar in Building B was discovered and
Yácata 5 was excavated to determine how it was built. The neighborhood of Santa Ana, which is in front of the
yácata pyramids was explored and more reconstructions of
yácatas and walls was done. In the 1970s, a detailed map was made of the site, relying on both that archaeology that has so far been done and period records. The ceremonial plaza and the perimeter, as well as
Yácatas 2 and 3, were the last to be studied. Building E, a storage facility was also found and explored. Outside the perimeter, an obsidian workshop with living quarters was found. The last time the area was studied was in 1992 by Efraín Cárdenas. The northwest face of the Great Platform was restored and the site museum was built. ==The site today==