Pan de muerto is the traditional Days of the Dead sweet yeast bread. It is decorated and placed on ofrendas (altars), along with candles, flowers, fruit, pictures, mementos, other foodstuffs, and beverages, as offerings to the departed.
The intricately decorated pan de muerto are from the Tlacolula Valley, and reference the geometric designs and mosaic fretwork found in the archeological sites in and around Mitla, a photo of which I’m using as browser background on this blog.