Sir Henry Piers 1st Baronet (1629–1691), of Tristernagh Abbey, County Westmeath, Ireland was an Anglo-Irish landowner, soldier, Member of Parliament, Sheriff of Counties Longford and Westmeath, Sheriff of St Johnstown, and an antiquarian.
[1] He was dubbed a knight by Henry Cromwell at Dublin Castle on 30 November 1658 (an honour that passed into oblivion with the Restoration in May 1660).
[4] He was MP for St Johnstown, County Longford between 1661 and 1666[5] and held the office of High Sheriff of Westmeath in 1663.
[1] Piers, whose mother was sister of the antiquarian Sir James Ware,[2] is remembered largely for his Chorographical Description of the County of Westmeath[6] written in 1682 and finally published in 1770.
[4] The Description contains many interesting historical details, such as an account of the ruins of Tristernagh Abbey (which were demolished in 1783 by Sir Henry's descendant, Pigott William Piers)[7] and remains an important source of history of the area.