Based on the clue '455 ad these people whose name is now synonymous w...', what is the answer?

What is associated with: 450 years of portuguese rule ended for this se african nation when it became independent june… What is associated with: 4500 years old its royal headdress of limestone makes it the finest in noseless architecture? What is associated with: 45000 students scores were raised on this test given 101296 after a math question was found fl… What is associated with: 45359 grams? Based on the clue '47 bc cleopatra think again', what is the answer? Based on the clue '47 of the 48 constellations he listed in his almag...', what is the answer? Based on the clue '47 yards across the compass seen here at sagres po...', what is the answer? Based on the clue '479 feet above sea level on the colorado river in ...', what is the answer?