Nyali Barro Lamp imagwira kutentha kwachilengedwe mu dongo ndi galasi. Nyali yokhazikika iyi imapangidwa ndi zinthu ziwiri pomwe mzinda waku Mexico wa Oaxaca ndiye munthu wamkulu. Wopangidwa ndi amisiri a San Bartolo Coyotepec omwe adziwa bwino Barro Negro kuyambira nthawi zakale za Columbian; dome lagalasi lowombedwa limakwirira dongo: chitetezo chophiphiritsa choteteza zinthu zamtengo wapatali. Nyali ya Barro imapezeka m'mitundu iwiri: dongo lofiira ndi mthunzi wowonekera ndi dongo lakuda ndi mthunzi wotuwa.