In 1871, Chicago was a great fire in the Great Chicago Fire by more than 18,000 buildings damaged after the death of over 300 people and a population of more than 100,000 people homeless because the city is adjacent to Lake Michigan. Severe winds raging fire tertiary faster within a single night. And burns consecutive one-day non-stop. After the corruption in Chicago Architects and engineers from across the US will gather together at Chicago. Help create and design new buildings. With this occasion Chicago has a new urban planning, as well. Technology has brought together a new building in Chicago. Skyscrapers have been built within the city. Including travel and communications hub in Chicago.