Although Ferns, Co. Wexford was the site of a Cathedral from the early twelfth century the religious use of the site is much older. The monastery at Ferns was founded by St. Aedan or Máedóg before his death in 624 AD. But the only remaining only evidence of the early monastery are the four high crosses in the graveyard. This image is of the west cross that is situated in front of the Cathedral.
Image of the south cross at Ahenny, Co. Tipperary. This is believed to be one of the earliest Irish High Crosses and dates from the eigth or ninth century. http://www.culturalheritageireland.ie/index.php/heritage-sites-and-centres/95-the-ahenny-high-crosses-near-carrick-on-suir-co-tipperary
St. Finden’s High Cross at Aghowle, Co. Wicklow. This 3.5m high granite cross has a head, shaft and base but is missing its capstone. There are carved panels on the west face and the sides of the shaft probably intended for carving but none on the east face. The cross has the appearance of being unfinished.
All that remains of the monastery at Kilclispeen, Co. Tipperary are 2 ringed High Crosses in the cemetery of Ahenny. The Ahenny Crosses are part of the Ossory Group which are believed to be the earliest crosses and date from the eigth to ninth centuries AD. The north cross (pictured) is 3.65m high and is ornamented all over except for 4 figure scenes on the base. On the north side is a procession with chariot. On the south side is a funeral procession which has been identified as the funeral of Cormac Mac Cuilennain, Bishop-King of Munster, killed at the battle of Beach Mughma (Bellaghmoon), Co. Kildare in 908 AD. On the east side is Adam naming the animals. On the west side is the Mission of the Apostles and Seven Bishops.
Highgate, Celtic cross