Answer: Germany
Explanation: The tradition of making decorated gingerbread houses started in Germany in the early 1800s.
The first real emperor was Qin Shihuangdi from the Qin dynasty
The phrase "insure domestic tranquility" means that the government should provide peace and order in the society. From the word itself, domestic - family, home, national and tranquility - state of being tranquil, calm, peace. The prase technically means the government should ensure the nation's peace and order.