Henry Grattan was an Irish politician and lawyer who campaigned for legislative freedom for the Irish Parliament in the late 18th century from Britain. He was a Member of the Irish Parliament (MP) from 1775 to 1801 and a Member of Parliament (MP) in Westminster from 1805 to 1820. He has been described as a superb orator and a romantic. With generous enthusiasm he demanded that Ireland should be granted its rightful status, that of an independent nation, though he always insisted that Ireland would remain linked to Great Britain by a common crown and by sharing a common political tradition.

The Parliament of Ireland was the legislature of the Lordship of Ireland, and later the Kingdom of Ireland, from 1297 until the end of 1800. It was modelled on the Parliament of England and from 1537 comprised two chambers: the House of Commons and the House of Lords. The Lords were members of the Irish peerage and bishops. The Commons was directly elected, albeit on a very restricted franchise. Parliaments met at various places in Leinster and Munster, but latterly always in Dublin: in Christ Church Cathedral, Dublin Castle, Chichester House (1661–1727), the Blue Coat School (1729–31), and finally a purpose-built Parliament House on College Green.