Newark Earthworks
Hopewell Newark Complex · Newark Earthwork Site
Hopewell culture 100 BCE–500 CE·Hopewell (Adena descended, Algonquian? cohort)·🇺🇸 Ohio, United States
About
About Newark Earthworks
Largest Hopewell earthwork complex (100 BCE–500 CE) with 3 surviving sections over 7 mi²: Octagon Earthworks (50 acre octagon joined to Observatory Circle 1050 ft diameter – lunar standstill observatory), Great Circle (1200 ft diameter, walls 15 ft high). Hopewell Ceremonial Earthworks UNESCO 2023 – enclosing 2000+ ha geometry demonstrating sophisticated geometry and lunar astronomy.
Why it mattersGreatest North American geometric earthworks; Hopewell astronomy most ancient lunar observatory in Americas
Open questions
Mysteries & theories
Mysteries
- 01How Hopewell measured 267 m circle radius without standard unit – 1053 ft Hopewell unit hypothesis
- 02Octagon to circle transition purpose
Theories
- 01Lunar standstill 18.6 yr min/max rise thesis – Hively-Horn
- 02Pilgrimage center vs population center debate
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- 100 BCE–100 CE major earthworks
- Period
- Hopewell culture 100 BCE–500 CE
- Culture
- Hopewell (Adena descended, Algonquian? cohort)
- Purpose
- Ceremonial pilgrimage precinct, astronomical observatory and social gathering
- Abandoned
- 500 CE Hopewell transformation
- Excavation
- Partially excavated
100 BCE
Great Circle begun
100 CE
Octagon-Circle avenue connected
2023
UNESCO inscription as Hopewell
On the ground
Structures & features
40.0478° N · 82.4158° W · 270 m · 3 mapped features
Octagon Earthworks
earthwork50-acre eight-sided enclosure joined to 321 m circle
40.0517° N · 82.4144° WGreat Circle Earthworks
earthworkSecond biggest Hopewell circle 387 m diameter museum section
40.0417° N · 82.4172° WWrights Earthworks (rect)
earthworkRectangular enclosure remnant squared
40.0453° N · 82.4120° W
Gallery