Underwater archaeologists exploring a sacred cenote near Tulum have recovered a conch shell trumpet featuring intricate jade inlays and glyphs associated with the rain god Chaac. Dating to the Terminal Classic period (approx. 850 CE), the shell shows significant wear on its mouthpiece, suggesting it was used for decades in ceremonies to summon the first rains of the season during the Maya month of Wo.
This discovery provides rare material evidence of the 'Calling of the Clouds' festival, a tradition that persists in modified forms among contemporary Maya communities. The ceremonial trumpet served as a sonic beacon, believed to carry the voices of priests directly into the watery underworld. The presence of jade, a symbol of life-giving water and breath, reinforces the high status of these seasonal ritual performances in maintaining the agricultural calendar.