In 2001, the "Big Board", as some termed the NYSE, was described as the world's "largest and most prestigious stock market". When the World Trade Center was destroyed on September 11, 2001, it left an architectural void as new developments since the 1970s had played off the complex aesthetically. The attacks "crippled" the communications network. One estimate was that 45% of the neighborhood's "best office space" had been lost. The physical destruction was immense: