Which Boston landmark was completed in 1742, a year before its builder died?

Construction of the Potala Palace began in 1645 in which mountainous Asian city? Construction of the famous Palazzo Vecchio began in 1299 in which Italian city? Construction of which Asian capital city, near Rawalpindi, began in 1961? Construction of which British cathedral on the River Avon began in 1220? Which consumer advocate urged viewers to stand up for themselves on the TV show "Fight Back!"? Consumers didn't warm to the nonrefrigerated milk in which company's 1998 cereal-and-milk combo, Breakfast Mates? Anthony Hopkins played which president in a 1995 Oliver Stone film? Which actress starred in "Contact," "The Accused" and "The Brave One"?