Tammapul is believed to be a Huastec settlement, but 35,000 ceramic remains found on-site suggest a simultaneous connection to the Río Verde culture from the neighboring San Luis Potosí.
[2] In 1950, San Luis Potosi historian Joaquín Meade visited the region, crucially drawing scholarly interest to the area.
In 1980, the historian Octavio Herrera Pérez, in conjunction with local residents, carried out extensive excavations and surrounded the pyramid with barbed fencing to prevent future desecration.
[2] Out of three circular constructions connected by paved roads, Tammapul's most outstanding structure is "El Cuizillo," known also as the Tula Pyramid.
In the Huastec culture, round pyramids were typically associated with the wind god Ehecatl, offering one explanation for the misty connotations of Tammapul's etymology.