gloss, “Sancti Joan. Cabezera.”

This is a gloss that refers to San Juan, a “cabecera” (a Spanish loanword meaning head town). [SW] This seems to be a reference to San Juan Calvario Texpolco. See Takanori Kobayashi, “History Engraved on the Urban Landscape: Formation of the Sacred City and Constructino of Traditional Festivals in Cholula, Mexico,” in Constructing, Deconstructing, and Reconstructing Social Identity: 2,000 Years of Monumentality in Teotihuacan and Cholula, Mexico, eds. Sbro Sugiyama et al (2013), 120–121.