What is Baron of Dunsany?

The title Baron of Dunsany or, more commonly, Lord Dunsany, is one of the oldest dignities in the Peerage of Ireland, one of just a handful of 13th- to 15th-century titles still extant, having had 21 holders, of the Plunkett name, to date. Other surviving medieval baronies include Kerry now held by the Marquess of Lansdowne, Kingsale, Trimlestown, Baron Louth and Dunboyne.