Designed by Antoni Gaudi, who also designed Sagrada Familia in Barcelona.
Oddly, it would have been built on the same area the World Trade Center later occupied. If it had though, it probably would have had a profound effect on architecture in NYC. Imagine if a trend caught on, buildings like the Empire State and the Chrysler probably would never have been built. I doubt though that this was possible in 1908, specially when you think about the 400 foot high exhibition hall.
Sketches by Joan Matamala:
Source:
http://www.gaudiallgaudi.com/F0012.htm
Source:
http://www.sinehead.com
Source:
http://www.sinehead.com