This incredible and unique gatehouse welcomes you into the monastic site that is Glendalough.
Originally a two story building it is now just the two arches. The second floor would have been where the gatekeeper lived.
Just inside the compound is a lovely, but faint, cross carved on a huge rock to the right, the sanctum marker.
From Laragh drive past the Glendalough visitors center until you round a sharp bend and cross a bridge. The gatehouse is straight in front of you. There is limited parking here.
Once past the Sanctum marker (the carved cross) you were grante 90 days sanctuary here no matter what the crime. Whilst here none of the local kings could touch you. However, after those ninety days you were cast outside. This was probably a way of making you take holy orders and join the monastery.
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.