[3] During archaeological excavations carried out in 1957 by Hernan Cubillos, director of the Ethnological Institute of the University of Cauca, during that time it was determined that the site "was a special formation, whose cover material is made up mainly of lateritic clays".
The indigenous people had built this pre-Hispanic pyramid with clay adobes and filled with earth for the celebration of funeral rites.
According to Cubillos, this occurred around 1940 when the municipality celebrated the fourth centenary of foundation of the city of Popayan, "the leveling of the hill was carried out, in order to create a platform to place the equestrian statue of the conquistador Sebastián de Belalcázar on that site and carry out ornamentation work".
[1] The Morro de Tulcán as it is known throughout the world is visited by thousands of people who can see from the platform imposed there the city in population growth but little is known that "the cut part destroyed two walls that determined it, according to the evidence obtained in our excavations were artificial and also made of adobe and filler”.
Political events occurred in September 2020 led to the demolition of the Spanish monument, as a result the University of Cauca announced that the archaeological studies in the area would be resumed, as a way of symbolic restitution.