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Tagsobservatory
5 places carry this tag, across every kind and continent it appears in.
🇨🇳 China · Ancient city
Late Longshan Taosi phase 2300–1900 BCE → Erlitou transition · Longshan (Taosi culture) → Early Xia? (Yao/Shun legend)
Late Longshan (Taosi phase) walled regional capital (c.2300–1900 BCE) at Tao Temple basin near Linfen, Shanxi — 280 ha enclosure (largest Longshan city in Yellow River basin) with rammed-earth outer…
🇲🇽 Mexico · Temple complex
Epiclassic – Postclassic (c.530–1040 CE) Bajío – Otomi–Toltec: Lerma tradition · Lerma – Bajío / Otomi
Cañada de la Virgen in the Laja valley saddle near San Miguel de Allende, Guanajuato, is a mountaintop Epiclassic observatory-city (530–1040 CE) of the Bajío–Otomi tradition at 1,950 m.
🇺🇸 United States · Ancient village
Chaco Bonito (Late Pueblo II) · Chaco (highland Ancestral Pueblo)
Perched astronomical great-house pueblo (c.1075–1125 CE, Chacoan) on 2,280 m ridge between two 30-m chimney pinnacles — southernmost Chaco outlier controlling Upper San Juan timber/ game highland.
🇬🇹 Guatemala · Pyramid
Middle Preclassic to Late Classic (1000 BCE–900 CE; E-Group 600–300 BCE) · Maya (Preclassic then Tikal sphere)
Type-site of Mesoamerican E-Group solar observatory: western radial pyramid E-VII (Late Preclassic 500 BCE) aligning via three eastern platforms to sunrise solstices/equinoxes, deliberate horizon…
🇺🇸 United States · Earthwork
Hopewell culture 100 BCE–500 CE · Hopewell (Adena descended, Algonquian? cohort)
Hopewell giant geometric enclosures marking 18.6-yr lunar cycle.
