Five units of the Dublin Fire Brigade were called to a fire on a roof in East Wall overnight.
The Seabank House caught fire shortly after midnight with the first emergency call at 12:40am.
Units rushed to the scene to see the inferno on the roof of the well-known pub.
A turntable ladder was used as a water tower to fight the fire, which was been extinguished.
Teams from North Strand, Tara Steet and Donnybrook attended the scene.
No one was believed to be in the pub at the time and no injuries have been reported as of yet.
Pictures from the scene show the extent of the fire although it is unknown how much damage was done inside the pub.