The Codex Borbonicus (or Codex Cihuacoatl) is a divinatory almanac inscribed in a single 14.2m long sheet of bark paper. A masterpiece of Aztec style, the codice is believed to have been made after the arrival of the Spanish.
Its first section is an intricate divinatory calendar, one of the few surviving. Each page represents one of the 20 trecena or 13-day periods, in the 260-day year. The pages are covered in paintings of the ruling deity or deities surrounded by the 13 day-signs and 13 other glyphs and deities. The collection of symbols, 26 of them, were used by the priests to create horoscopes and divine the future. The second section documents the Mesoamerican 52-year cycle, correlating the order of the dates of the first days of each solar year with the nine Lords of the Night; and the third section focuses on rituals and ceremonies, especially for the last days of the 52-year cycle.
You can see the whole 14 meters here.