Laois born Sr Jacinta Bracken vanished on May 19 1979 while shopping for a birthday present for her mother.
Originally from Gorteen near Ballacolla, the 38 year old was last seen near a multi storey car park in Swansea, south Wales by two children she taught.
She had been based at the Stella Maris convent in Swansea, south Wales.
Her handbag was found on the foreshore the next day by a local boatman, about nine meters from the West Pier. A police search was carried out in the area but nothing was ever found.
At first, it thought that she may have returned to Ireland, but this theory was ruled out when all her belongings, which included her sailing ticket and cash, were found in the convent.
Inquiries confirmed that no passport was issued nor any death registered under her name in the last 27 years.
Now police have launched a fresh appeal for information to throw light on the case.
Speaking this week Detective Inspector Andy Hughes who is overseeing the case said, “we are keeping this case open and will be conducting further investigations shortly. Hopefully we can get the answer to it all.”
SIC: CIN