Further testing and analysis is required—carbon dating would help, as would additional research by astronomers.  At least the site is 3rd millennium BC, and possibly it is 5th millennium BC.  No matter how old the site is, it is older than the henges in Europe, as is the observatory at Metsamor.  They are unique—unlike any other henge found. 

Remarkably there are two ancient astronomical monuments in Armenia.  And there are zodiac signs inscribed on the face of mountains in Armenia as old as any found in the Near East, perhaps older.  

 "We like to think we are an old country because we were the first Christian state," Herouni concludes.  "But here are monuments thousands of years older than Christianity—these are the first signs of religion itself.  And yet who looks at them?" 

The monuments at Metsamor and Sissian remind us of the first steps to civilization, and they remind us of something else.  "After all, if you believe in the Bible, God made the heavens, and then he made the earth."