Gardai are investigating the sudden death of a man in his 50s near Grafton Street.
He was found unconscious on the footpath of Suffolk Street at around 4 o'clock this morning.
It's understood he had been sleeping rough.
Emergency Services treated him at the scene and he was taken to St James' Hospital where he was pronounced dead.
The coroner has been notified and anyone with information is asked to contact Pearse Street gardai.
However, at this stage, detectives do not suspect any foul play.