Archaeologists find huge, 2,500-year-old Egyptian astronomy observatory 

 An Egyptian dig uncovered a massive building that shows considerable evidence of astronomy observations, including a sundial and features meant to track the sun and stars. 

https://cdn.mos.cms.futurecdn.net/N2veiNwAUKo3DssWQF5oTL.png

https://www.space.com/ancient-egyptian-observatory-tracked-sun-stars