Based on the clue 'around 132 ad chinese scientist chang heng invente...', what is the answer?

What is associated with: around 1250 this countrys king alfonso iii reclaimed the algarve from the moors after 500 year… What is associated with: around 1260 this country acquired greenland iceland under haakon iv haakon iiis illegitimate s… What is associated with: around 1268 roger bacon observed that these new optical devices could be used to improve eyesi… What is associated with: around 1271 the city of herat afghanistan was visited by this famous venetian? What is associated with: around 1325 bc this boy king was buried in a gold mask inside 4 coffins one of which was made… What is associated with: around 1332 bc this pre teen became king of egypt his reign was kinda meh but the stuff he lef… What is associated with: around 1340 feet below sea level the dead sea? What is associated with: around 1347 bc at the age of 9 his rule as pharaoh began?