An archaeological excavation has changed our picture of Dublin's earliest Viking settlement with the black pool or Dubh Linn now known to be a lot bigger than first thought.
The dig beside Dublin Castle has also uncovered the city's oldest police cells and a punishment burial.
The excavation is taking place on Ship St near where the remains of one of the Dublin's oldest churches - St Michael le Pole that was founded in the 6th century - are known to be.
Archaeologist Alan Hayden from University College Dublin said the work has uncovered the cells from a police station on Chancery Lane built in 1830, and beside it are walls from a medieval farm.
There are 12th Century quarries which provided the stone to build Dublin Castle and its walls.
The most important discovery yet is that Dubh Linn - the pool on the River Poddle where the Vikings first settled - was much bigger than originally thought.
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