The Chamorro Raise Latte Stone Pillars

Sometime between about AD 800 and 1200, by differing archaeological estimates, ancient Chamorro builders across the Mariana Islands began erecting two-part megalithic structures known as latte stones. These distinctive assemblies consisted of a base pillar called a haligi, which typically tapered toward the top, and a hemispherical capstone called a tasa, set flat side upward. Found extensively across Guam, Rota, Tinian, Saipan, Aguijan, and several northern islands such as Pagan, latte stones served primarily as foundational supports for elevated buildings. Within the broader context of Pacific architecture, where distinct traditions also produced monumental stonework like Nan Madol on Pohnpei, latte stones remained unique to the Marianas archipelago.

The physical components of latte structures varied significantly depending on location, available resources, and structural intent. Builders carved the pillars from limestone, basalt, or sandstone, extracting the blocks from inland quarries before transporting them to coastal and village sites. Capstones for small to moderate structures were often fashioned from natural hemispherical coral heads collected from surrounding reefs. For exceptionally massive assemblies, such as those found on Rota, the capstones were quarried from stone alongside the shafts. The largest latte ever attempted were never finished: their shafts and capstones still lie in the As Nieves quarry on Rota, and had they been raised they would have outsized every standing latte in the islands.