Based on the clue 'built as a convent school an australian museum hon...', what is the answer?

Based on the clue 'built about 50 years ago its the only world capita...', what is the answer? What is associated with: built around 1600 this venetian bridge links the doges palace with nearby infamous prisons? What is associated with: built around 1776 tank cottage in this city is said to be the oldest house in wisconsin? What is associated with: built around 1830 this first us locomotive shared its name with a diminutive pt barnum star? Based on the clue 'built at a cost of more than 200 million it stretc...', what is the answer? Based on the clue 'built at the turn of the century the metropol on t...', what is the answer? What is associated with: built between 1585 1593 belyi gorod helped defend this world capital? What is associated with: built between 1732 1756 this philadelphia building is on the reverse of the bicentennial half…