The first of the Irish castles on this list, and the third Marshal castle.
Ferns stands at an important strategic site as the area was historically the capital of the Kings of Leinster. Diarmait Mac Murchada was the last King of Leinster and he invited the Normans, led by Richard de Clare, to Leinster to regain his kingdom. He promised both his daughter, Aoife, and the inheritance of his kingdom to Strongbow as a reward. Isabel de Clare was Strongbow and Aoife’s daughter and through her marriage to William Marshal Ferns came into Marshal hands. More about the background to all of this can be found here. Diarmait was also buried in Ferns and his grave can be seen there today.
There was an earth and timber motte and bailey castle on the site built by the kings of Leinster before Marshal arrived in Ireland, but the castle, the remains of which you can see today, was most likely built by William Marshal. The original castle was built between c.1199 and c.1220 so most likely William Marshal the elder begun the building, but he died in 1219 so his son William Marshal the younger most likely finished it. There were later additions made though.
The castle may not look especially impressive, but the interior has a significant number of original features including original floors in some places, a stunning chapel with some of the original carvings and a spectacular vaulted ceiling. There is also a complete original cellar with a beehive vaulted ceiling. Additionally in the cellar are trip steps which were specifically built so any raider coming down into the cellar would fall, injuring himself hopefully fatefully.
The ditch around the castle was intended as a moat, but it was a dry moat and would have likely been filled with rubbish. The castle was lost and retaken several times by both the Irish and the Normans over the centuries. The current condition of the castle is due partly to neglect but also due to the demolition of it by Cromwell’s forces in the 17th century.
Site visits 2012 and 2015
Ferns Castle information brochures.
Castles and Ancient Monuments of Ireland 9781854107527