Pelli was named one of the ten most influential living American Architects by the American Institute of Architects in 1991.
In 1995, he was awarded the American Institute of Architects Gold Medal.
 In May 2004, Pelli was awarded an honorary Doctor of Humane Letters degree from the University of Minnesota Duluth where he designed Weber Music Hall.
In 2005, Pelli was honored with the Connecticut Architecture Foundation's Distinguished Leadership Award.

Buildings designed by Pelli during this period are marked by further experimentation with a variety of materials (most prominently stainless steel) and his evolution of the skyscraper.
One Canada Square at Canary Wharf in London (opened in 1991); Plaza Tower in Costa Mesa, California (completed 1991); and the NTT Headquarters in Tokyo (finished 1995) were preludes to a landmark project that Pelli designed for Kuala Lumpur, Malaysia.
The Petronas Towers were completed in 1997, sheathed in stainless steel and reflecting Islamic design motifs.
The dual towers were the world's tallest buildings until 2004.
That year, Pelli received the Aga Khan Award for Architecture for the design of the Petronas Towers  Pelli's design for the National Museum of Art in Osaka, Japan, was completed 2005, the same year that Pelli's firm changed its name to Pelli Clarke Pelli Architects to reflect the growing roles of senior principals Fred W. Clarke and Pelli's son Rafael.
Pelli was named one of the ten most influential living American Architects by the American Institute of Architects in 1991. In 1995, he was awarded the American Institute of Architects Gold Medal.  In May 2004, Pelli was awarded an honorary Doctor of Humane Letters degree from the University of Minnesota Duluth where he designed Weber Music Hall. In 2005, Pelli was honored with the Connecticut Architecture Foundation's Distinguished Leadership Award.
Buildings designed by Pelli during this period are marked by further experimentation with a variety of materials (most prominently stainless steel) and his evolution of the skyscraper. One Canada Square at Canary Wharf in London (opened in 1991); Plaza Tower in Costa Mesa, California (completed 1991); and the NTT Headquarters in Tokyo (finished 1995) were preludes to a landmark project that Pelli designed for Kuala Lumpur, Malaysia. The Petronas Towers were completed in 1997, sheathed in stainless steel and reflecting Islamic design motifs. The dual towers were the world's tallest buildings until 2004. That year, Pelli received the Aga Khan Award for Architecture for the design of the Petronas Towers  Pelli's design for the National Museum of Art in Osaka, Japan, was completed 2005, the same year that Pelli's firm changed its name to Pelli Clarke Pelli Architects to reflect the growing roles of senior principals Fred W. Clarke and Pelli's son Rafael.
César Pelli