architects are reviving an ancient Mayan stucco technique for contemporary buildings, merging modern architecture with regional history and culture. The technique is called “chukum,” a term derived from the colloquial name for the Havardia albicans tree native to Mexico. Made with chukum tree bark, the material has several defining qualities that separate it from traditional stucco, including impermeable properties and a natural earthy color.

https://www.archdaily.com/946291/the-rustic-beauty-of-the-chukum-in-modern-mexican-architecture