Johannes Kepler Discovered three laws of planetary motion.
Originally, Ancient Rome practiced politheism, however poor people and slaves gradually started to believe in Christianity as a way of salvation to they miserable lives. The expansion of Christianity could not be stopped by the Emperors, which resulted in Emperor Constantine made it legal in 313 AD and eventually, the workship of other gods was made illegal in 391 AD.
Article IV (four) of the Constitution of the US discusses the obligations of the national government to the state and the obligation of the states to each other.
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