On March 8th, 1966, Nelson’s Pillar on O’Connell Street in Dublin exploded and tumbled to the ground. Here is a photo of the immediate aftermath of that event. Nobody was injured in the explosion, but the pillar didn’t survive. It was replaced by the Spire of Dublin, built in 2002.
Source: National Library of Ireland
There’s a pretty good book on the history of the pillar available on Amazon.