Chimney Rock Great House Pueblo
Chimney Rock Pueblo (5AA83) · Chimney Rock National Monument Great House
Pueblo II (Chacoan, 925–1125 CE)·Ancestral Puebloan (Chacoan)·🇺🇸 Colorado, Archuleta County, United States
About
About Chimney Rock Great House Pueblo
Northernmost great house of the Chacoan world (c.925–1125 CE), perched at 2,300 m on a ridge between Chimney Rock and Companion Rock spires 8 km south of Pagosa Springs. Two-story 36-room Chaco-style great house with core-veneer masonry, kiva and great kiva 12 m diameter aligned to major lunar standstill rise between the twin spires every 18.6 years. Built by Ancestral Puebloans of Chaco tradition; excavated 1965–1970 Frank Eddy; 4,700-acre National Monument 2012. Demonstrates Chacoan lunar cosmology at northern frontier.
Why it mattersDocuments Chacoan lunar standstill astronomy and northernmost expansion; test of great house chronology vs Chaco Canyon.
Open questions
Mysteries & theories
Mysteries
- 01Why Chaco built northernmost outlier 150 km north of Chaco Canyon at standstill viewpoint
- 02Labor logistics for importing Chaco masonry tradition to high ridge
Theories
- 01Lunar pilgrimage center — standstill as calendrical anchor for Chacoan ritual
- 02Elite emulation: local Pagosa population emulated Chaco to legitimize authority
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- c.925–1125 CE (Pueblo II)
- Period
- Pueblo II (Chacoan, 925–1125 CE)
- Culture
- Ancestral Puebloan (Chacoan)
- Builders
- Ancestral Puebloan (Chacoan tradition)
- Purpose
- Astronomical observatory and frontier great house controlling Piedra drainage
- Abandoned
- c.1125 CE (drought-driven Chaco collapse)
- Rediscovered
- Recorded 1921 Jeancon; excavated 1965 Eddy; monument 2012
- Excavation
- Partially excavated
c.925 CE
Initial great house construction (Chacoan masonry)
c.1076
Major lunar standstill event — building peak
c.1125 CE
Abandonment during Chaco regional collapse
2012
Designated Chimney Rock National Monument (Obama)
On the ground
Structures & features
37.1930° N · 107.3030° W · 2100 m · 2 mapped features
Great House (Pueblo II core-veneer)
structure36-room two-story Chaco-style great house with banded masonry
37.1940° N · 107.3020° WGreat Kiva with lunar-spire sightline
kiva12 m great kiva whose doorway aligns to major lunar standstill rise between Chimney Rock spires
37.1919° N · 107.3038° W