People with disabilities and their carers are to be allowed free access to all Office of Public Works managed heritage sites nationwide from 1 May.
The move has been announced by Minister of State for the OPW, Kevin 'Boxer' Moran.
It follows the decision to grant free entry to children aged under 12 last summer.
Mr Moran also confirmed that the OPW will continue to provide of sign language tours for deaf and hard of hearing visitors this year, with tours organised in a number of locations around the country throughout the summer.
He said the dates and venues would be announced shortly.
The OPW said that 74,000 children under 12 visited its sites in July and August of last year.
Under the scheme, fee-paying sites managed by the OPW's Heritage Service admit children under 12 free, when they are accompanied by at least one adult.
OPW managed attractions include two world heritage sites – Brú na Bóinne and Skellig Michael – as well as Newgrange, Clonmacnoise, Dún Aonghasa and Kilmainham Gaol.
