Papel picado ("perforated paper," "pecked paper") is a decorative Mexican folk art made by cutting elaborate designs into sheets of tissue paper that was popularized in San Salvador Huixcolotla. It is thought to have originated from the pre-Hispanic practice of making religious offerings with amate bark paper. Among the first makers were Juan Hernandez, Cristóbal Flores, Santiago Vivanco R., and Lauro Pérez Macías. By the late 1920s it had spread outside Puebla to Tlaxcala and is now used around the world in observations of "Día de Muertos" (Day of the Dead). In addition to "Día de Muertos", known locally as "Todos Santos", papel picado is also commonly made to celebrate Semana Santa (the Holy Week of Easter), Mexican independence, and Christmas. In 1998 the governor of Puebla declared the town, in which 35% of the residents participate in this craft, a cultural heritage of the state. Papel picado from Huixcolotla is exported around the world via the Museo Nacional de Arte.