What is associated with: completed in 1791 it was reopened in 1989 after being closed for 28 years?

Based on the clue 'completed around 691 this muslim shrine in jerusal...', what is the answer? Based on the clue 'completed circa 143 the romans antonine wall ran f...', what is the answer? Based on the clue 'completed during his reign the sistine chapel was ...', what is the answer? What is associated with: completed in 1345 the ponte vecchio crosses over the arno river in this european country? What is associated with: completed in 1825 this new york waterway cost more than 7 million to build? What is associated with: completed in 1843 his column is 185 feet high his 17 foot high statue stands atop it? What is associated with: completed in 1849 the chain bridge over this river linked the cities of buda and pest? What is associated with: completed in 1856 californias first railroad ran 22 miles between sacramento this prison city?