Twelve avenues radiate from which Paris monument, completed in the 1830s?

In 1170, Reginald FitzUrse and three other knights murdered which archbishop? Keokuk, which set a state record of 118°F in 1934, is in which state? Only three kings of England have had which name, each taking the throne in 1189, 1377 and 1483? Pendleton, which reached 119°F in 1898, a record high for its state, is in which state? What is a 12-inch hot dog called? Which 12-letter word means "beneath the skin"? About 12 million future Americans were inspected at which immigration station? Twelve of the 33 of which bones are thoracic?