This construction of pre-Hispanic origin also exists in Puebla and Guerrero, but its shape and roof are characteristic of Morelos. The community that best preserves them and has been manufacturing them in miniature for some years is Chalcatzingo, Jantetelco.
It consists of a circular base of carved stones and joined with mortar, which is crossed by two channels that serve as ventilation. The central body is a “pot” formed by chains of grass mixed with mud; The so-called iguanas or brooms are intertwined on the neck of the pot that will allow the rain to slide off. The interior is crossed by morrillos or branches that serve as interior scaffolding; The roof is a kind of palapa that has an internal structure of conical morrillos, it is made with red grass from the region that must be cut in the last third of the year. The cuexcomate has a lower hole called the navel through which the grain is removed and covered with corn cobs.
As a barn it is a technological marvel, it prevents the access of rodents and insects due to its conical shape and its grass chains, it is thermal and can contain up to a ton and a half of grain.