The Irish parish was based on the Gaelic territorial unit called a
túath or
Trícha cét. Following the
Norman invasion of Ireland, the
Anglo-Norman barons retained the
tuath, later renamed a parish or manor, as a unit of taxation. The civil parish was formally created by
Elizabethan legislation. Accounts were kept of income and expenditures for each parish including pensions and poor relief. Statutes were based on ecclesiastical parishes, although it is not known how well-defined such parishes were. At the time of the
English Civil War, in 1654–56 a Civil Survey was taken of all the lands of Ireland. It proved inaccurate, and in 1656–58 the
Down Survey was conducted, using physical measurements to make as accurate a map as was possible at the time of
townlands, parishes and
baronies. This became the basis for all future land claims. Parishes are an intermediate subdivision, with multiple townlands per parish and multiple parishes per barony. A civil parish is typically made up of 25–30 townlands. It may include urban areas such as villages. A parish may cross the boundaries of both baronies and counties; in some cases it may be in several geographically separate parts. Civil parishes had some use in local taxation. They were included on the nineteenth-century maps of the
Ordnance Survey of Ireland. The
Local Government (Ireland) Act 1898 established
administrative counties divided into
county districts (urban districts and rural districts) making parishes largely obsolete, and they were removed from subsequent editions of OS maps. For
poor law purposes
district electoral divisions replaced the civil parishes in the mid-nineteenth century. Townlands are the smallest land unit in Ireland, and were the most precise address that most rural people had until the 2015 introduction of
postcodes. ==Relationship to ecclesiastical parishes==