At the side of the cathedral there are the thick-walled foundations of an oratory known as St Brigit's Fire House. It is said that this used to house the eternal flame of St Brigit. Some reports say it was Cromwell's men who extinguished it, but they get the blame for everything!
Apparently, a flame was relit here in 1993 and is still burning where it is kept. A fire is still lit here on 1st February, which is St Brigid's feast day.
Here is some info in St Brigit from the ever trustworthy Wikipedia.
This is an explanation of (and a bit of a disclaimer for) the coordinates I provide.
Where a GPS figure is given this is the master for all other coordinates. According to my Garmin these are quite accurate.
Where there is no GPS figure the 6 figure grid reference is master for the others. This may not be very accurate as it could have come from the OS maps and could have been read by eye. Consequently, all other cordinates are going to have inaccuracies.
The calculation of Longitude and Latitude uses an algorithm that is not 100% accurate. The long/lat figures are used as a basis for calculating the UTM & ITM coordinates. Consequently, UTM & ITM coordinates are slightly out.
UTM is a global coordinate system - Universal Transverse Mercator - that is at the core of the GPS system.
ITM is the new coordinate system - Irish Transverse Mercator - that is more accurate and more GPS friendly than the Irish Grid Reference system. This will be used on the next generation of Irish OS maps.