The Saltire awards cover a range of disciplines including litereature art and engineering. Winner of the civil engineering award was Glasgow's Finnieston Bridge, more commonly known as the Clyde Arc.
The bridge has become a city icon since its completion in September 2006. Judges said it "Demonstrated excellence in concept, design and construction."
Earlier in the day, he visited what is believed to be the largest collection of Thomas Telford memorabilia assembled, at the Scottish National Portrait Gallery.
The collection was curated over eight months by Sheila MacKenzie and Imogen Gibbon. More than 150 pieces were on display.
The includes full-sized reproductions of some of Telford's original drawings and plans.
"It was originally designed to be a touring exhibition, but this did not happen in the end. Instead, separate exhibitions were held at the Guildhall, Ironbridge and now here. But this is the largest," said MacKenzie.
Unfortunately, the exhibition is unlikely to tour. "There are so many loans it could be difficult. Most of what is on display is not archive material," said Gibbon.
Reproductions include several period photographs, a stereoscope with Telford structures featured, and the ICE's own portrait of Telford. A consistent favourite is the Norman Wilkinson oil of the Menai suspension bridge, created for a 1930s poster campaign.