What 1,600-year-old subterranean ice storage chamber was unearthed at Busosanseong Fortress, South Korea, in January 2026?

A significant archaeological find at Busosanseong Fortress in South Korea in October 2025 revealed a remarkable subterranean ice storage chamber, or 'binggo', dating back approximately 1,400 years to the Baekje Kingdom's Sabi period (538–660 CE). This discovery marks the first Baekje-era ice storage facility ever confirmed, offering invaluable insights into the advanced engineering and sophisticated lifestyle of ancient Korean royalty.

The excavated structure, measuring roughly 7 by 8 meters and 2.5 meters deep, features a U-shaped interior meticulously carved into bedrock. Archaeologists noted that the southern wall was later reinforced with stone blocks, likely to enhance insulation and control melting, while a circular drainage pit at the center of the floor demonstrates an ingenious design for managing water runoff. These architectural details highlight the Baekje people's sophisticated understanding of temperature and humidity control, crucial for long-term ice preservation in a world without modern refrigeration.

Such ice storage facilities were not merely practical; they were symbols of royal power and privilege in East Asia, providing chilled water and preserving food during hot summer months. The presence of this 'binggo' at Busosanseong, a UNESCO World Heritage site that served as the Baekje royal fortress and a strategic stronghold, underscores the kingdom's advanced statecraft and the hierarchical nature of its society. Alongside the chamber, a ritual jar, known as a 'jijingu', containing five ancient Chinese 'wushu' coins was also found, believed to be an offering for safety and good fortune during the construction.