In the U.S.A.
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Built? or flown? The first airplanes (I'm excluding balloons, kites and unmotorised gliders) were built as small models as early as 1848 in England and France.
However the first large scale aircraft were built in Russia, France, Germany, England, US etc. Pretty much all over the place. There was a lot of activity to develop a successful airplane and I'm not sure if anyone is actually recorded as being the first to build one. The patent offices have many hilarious patents on file for various "heavier than air" machines and most were spectacular failures.
It was actually China. China built the first rockets in the form of fire works, since it was the first country to have/invent gun powder.
Germany
Germany
Germany
sweden, its country of origin
USA
Scotland
France
northeast
The first castles were built in England in 1066. This was after the Norman conquest, when William the Conqueror introduced them to the country.
France was the first country to build a steam powered ship.
The North The North