Sinn Fein's accused a Labour minister of misleading the Dáil - and says he's deliberately intetfered to stop Sinn Féin running a 1916 event at the GPO.
The party says Alex White, the communications minister, is the only person who has the power to stop the GPO from being used for certain events.
Sinn Féin was planning a light show at the historic building during Easter Week next year, as part of its own events to mark the centenary of the Rising.
But Aengus Ó Snodaigh says Alex White is misleading the Dáil when he denies any responsibility:
