Fire crews have blasted the flames with a water jet while flames could be seen through the scorched windows and billowing out of the roof of Glasgow School of Art's (GSA) Charles Rennie Mackintosh building.
The Scottish Fire and Rescue Service have sent several appliances from Cowcaddens, Yorkhill and Maryhill fire stations to the fire at the famous sandstone building.
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The signs were encouraging to commuters going about the transport network the day after a terror attack in Westminster.
Faith leaders from across London say religious communities will "stand together" in the wake of the Westminster terror attack.
Pc Keith Palmer was among the three people killed yesterday in the Westminster terror attack.