Ancestry database has added some important 19th century records covering critical periods prior to and following the Irish Potato Famine.
Griffith's Valuation, 1848-1864
This index has approximately one million individuals who occupied property in Ireland between 1848 and 1864.Griffith's Valuation is an invaluable reference for family historians with ancestors in Ireland in part because no census material from the nineteenth century has survived. It is the only detailed guide to where in Ireland people lived in the mid-nineteenth century and what property they owned or leased.
Tithe Applotment Books, 1823-1837
These record the results of a unique land survey taken to determine the amount of tax payable to landholders to the Church of Ireland, the established church until 1869. This data set represents a virtual census for pre-famine Ireland. Since it covers all of Ireland and is important in terms of constructing, not just an image of a particular family line, but of wider social conditions in the country.
Ordnance Survey, 1824-1846
This collection may be used in conjunction with other databases on Ancestry such as Ireland, Index to Griffith's Valuation, 1848-1864. The detailed maps of Ireland that make up this database took 20 years to complete and offer an unparalleled look at 19th-century Ireland around the time of the Great Famine.
Lawrence Collection of photographs, 1870-1910
This collection contains early photographic collections documenting Ireland, the 21,000 photographs were named for William Lawrence, who opened a photography studio in Dublin in 1865. The 40,000 glass-plate negatives are now housed in the National Library of Ireland.