Mesoamerican Long Count calendar the use of zero as a place-holder and presents one of the earliest uses of the zero concept in history. On Maya monuments, the Long Count syntax is more complex. The date sequence is given once, at the beginning of the inscription and opens with the so-called ISIG (Introductory Series Initial Glyph) which reads "tzik-a(h) hab’ [patron of Haab' month]" ("revered was the year-count with the patron [of the month]"). Next come the 5 digits of the Long Count, followed by the Calendar Round (tzolk'in and Haab') and supplementary series. The supplementary series is optional and contains lunar data, for
Calendar house the year. And even the park wall has 12 doors opening towards the outside, seven of which face towards the city. A possible Mesoamerican example is El Castillo, Chichen Itza, which is a Mesoamerican step pyramid with 91 steps on each of its four sides. Taking these steps, and adding the temple platform on top as the final "step", produces a total of 365 steps. Calendar house A calendar house is a house that symbolically contains architectural elements in quantities that represent the respective numbers of days in a year, weeks in a year, months in a year and days