The 28-year-old was attacked by four men at 5.40pm on Monday as he stood under the Crann an Oir monument on Dame Street, Dublin.
The victim, who was known to gardai, suffered serious stab wounds to his stomach and cheek and was rushed to St James' Hospital where his condition is described as critical.
COMMENT RULES: Comments that are judged to be defamatory, abusive or in bad taste are not acceptable and contributors who consistently fall below certain criteria will be permanently blacklisted. The moderator will not enter into debate with individual contributors and the moderator’s decision is final. It is Belfast Telegraph policy to close comments on court cases, tribunals and active legal investigations. We may also close comments on articles which are being targeted for abuse. Problems with commenting? email@example.com