Cahokia Woodhenge
... that the Cahokia Woodhenge , built by the Native American Mississippian culture between 900 and 1100 CE, was a timber circle solar calendar used to observe solstices and equinoxes?
... that the <b id="mwBNs"><a href="./Cahokia_Woodhenge" id="mwBNw" rel="mw:WikiLink" title="Cahokia Woodhenge">Cahokia Woodhenge</a></b> <i id="mwBN0">(pictured)</i>, built by the Native American <a href="./Mississippian_culture" id="mwBN4" rel="mw:WikiLink" title="Mississippian culture">Mississippian culture</a> between 900 and 1100 CE, was a <a href="./Timber_circle" id="mwBN8" rel="mw:WikiLink" title="Timber circle">timber circle</a> solar calendar used to observe solstices and equinoxes?