Picture-writing Writing 12 History 11 Antiquities 9 Petroglyphs 9 Rock paintings 8 Religion 7 Gehiago ... Indians of North America 6 Aztecs 5 Manuscripts, Mixtec 4 Mixtec Indians 4 Mixtec language 4 Kings and rulers 3 Nahuatl language 3 Algonquian Indians 2 Aztec calendar 2 Criticism and interpretation 2 Historiography 2 Human sacrifice 2 Kongo (African people) 2 Kongo language 2 Manuscripts, Mexican 2 Manuscripts, Nahuatl 2 Rites and ceremonies 2 Signs and symbols 2 Social aspects 2 Symbolism in communication 2 Visual communication 2 Warlpiri (Australian people) 2 Written communication 2 gutxiago ...