The Carrickmacross lace-making technique used on Kate's wedding dress also featured on Diana, Princess of Wales's wedding dress.
The technique, used for the delicate lace applique flowers on the train and bodice of Kate's dress, is named after the market town in Co Monaghan where it originated.
According to the County Monaghan tourist website, Carrickmacross Lace was first established in the 1820s by Mrs Grey Porter, wife of the rector of Donaghmoyne.
It went into decline in the 1840s but later revived.
The Carrickmacross Lace Gallery, which is a co-operative, continues to make the fine lace.
On its website, it said the lace was historically "made by the poor for the rich and famous".