The pillars in the calendar wall track the course of the setting sun throughout the year.
Each pillar corresponds to one of the 11 chasquis on the frieze on the Sun Gate.
The Tiwanaku calendar represents one of the greatest achievements of Tiwanaku and the world.
Tiwanaku location co-ordinates 16° 33' 17"S 068° 40' 25"W Google maps
Tiwanaku - A City Lost in Time,
collection of historic photos, drawngs and essays on Tiwanaku
along with an analysis of the calendar and of the Tiwanaku cubits.
now published in paperback