Amendments to the Constitution of Ireland are only possible by way of referendum. A proposal to amend the Constitution of Ireland must be initiated as a bill in Dáil Éireann, be passed by both Houses of the Oireachtas (parliament), then submitted to a referendum, and finally signed into law by the president of Ireland. Since the constitution entered into force on 29 December 1937, there have been 32 amendments to the constitution.
Aside from amendments to the Constitution itself, the Constitution also provides for referendums on ordinary bills; this is known as an ordinary referendum. This provision has never been used.
