Throughout the first 200 years New York City followed Europe in architectural styles. Throughout XVIII and XIX centuries the basic architectural tendencies of the NYC architecture traced the European traditions. But with occurrence of skyscrapers, the New York City architecture has gone the own way. First the US nation in own way adapted Adam's neoclassical style: were building small square houses. For example, in architecture of the City Hall federal style is combined with the French Renaissance.
Throughout XIX century rough sandstone which was extracted in a nearby valley of the Connecticut river and on river banks of Hackensack (New Jersey) was the most widespread and cheap building material in NYC. Small apartments from this material can be seen in all residential areas of New York City, the best are in Chelsea Area.
Hostels were building for the immigrants arriving during the period since 1840th years up to the First World War. The most amusing architectural forms have been thought up by resourceful architects to disguise unsightly water towers so necessary for a city on roofs of houses.
In the XIX-century the NYC's architects brought the contribution to the world architecture by wide application of pig-iron — it was cheaper than a stone or a brick. It was possible to produce in advance separate elements of a facade. Today in New York City the greatest in the World concentration of the facades executed from pig-iron. The best samples are constructed in 1970th years in historical area the Soho.
The World Trade Center till September, 2001 was the highest. The Center has been executed in the style of «a glass box», eternal memory to all victims of this perfidious act of terrorism.