MEPs from various political parties are due to address the Seanad later today as part of a campaign to raise awareness of the proposed EU constitution.
The day-long address was arranged in an effort to provoke debate about the document, which is designed to replace all existing EU treaties.
Those due to give speeches today include one of Sinn Féin's two MEPs, who oppose the proposed constitution.
The document paves the way for the appointment of an EU president and foreign minister and also removes the national veto in a range of new policy areas.
The Government is planning to hold a referendum to let the people have their say on the changes but the vote may never go ahead as there is major concern that the French electorate may reject the constitution later this month.
The euro-sceptic Dutch and British electorates are also due to vote on the document in the coming year.