In Pictures: Major fire rips through Glasgow School of Art
Crews were called to the building in the city centre at around 11.20pm on Friday.
Fire crews worked through the night to tackle the second huge blaze to hit Glasgow School of Art in just four years.
It's feared work to restore the Mackintosh Building following the 2014 fire has been completely destroyed.
Astonishing pictures show the scale of the blaze, how it was tackled and the aftermath on Saturday morning.