Roman Catholic baptism, marriage and burial registers, unlike so many of their Church of Ireland counterparts, were not damaged in the 1922 fire at the old Public Record Office. That's the good news.
The bad news is that, as a result of restrictions placed on Irish Catholics from 1550 until the Emancipation Act of 1829, proper record keeping was difficult and potentially dangerous for priests and their congregations, and only a small proportion of Roman Catholic baptism, marriage and burial registers survive from before the 1820s.
There are some real highlights, however.
A number of urban registers date back to the mid-1700s – examples include St Mary's in Limerick City (from 1745)and St Catherine's in Dublin (from 1740).
Even some small rural RC parishes managed to keep their registers more or less intact from these early days.
Examples of the latter include Wicklow (1747), Nobber in Co. Meath (1754) and Kilkerley in Co. Louth (1752).
But the very oldest Irish Catholic records leap back almost another century; registers survive for Wexford Town since 1671.
Admittedly, the legibility of these registers is poor for the first 15 years or so, and there are quite a few gaps in coverage across the centuries, but if your Catholic ancestors hailed from this town you have a real chance of being able to trace your family history over four centuries.
That's exceptional for Irish genealogy.
In general, the oldest records hail from the more prosperous and anglicised eastern half of the island. Registers for more densely populated and poorer parishes in the west and north usually do not start until the mid-19th century.
Of course, the poorer areas were also those that supplied the greatest numbers of emigrants, which means that the descendants of those that left Ireland are the most likely to be frustrated by the lack of Catholic records.
Fortunately, the majority of Roman Catholic baptism and marriage registers date from the first quarter of the 19th century ie some 40 years before the Irish civil registration system began. When it comes to burial registers, the picture is rather more patchy (see below).
Surviving Roman Catholic baptism records usually record the date of baptism, the child's name, the father's name in full, the mother's first name and maiden surname, the name of any godparents (sponsors) and the residence of the parents. Unfortunately, this latter element does not always appear.
The inclusion of the mother's full maiden name, however, is the norm, unlike in Church of Ireland' registers.
This is a huge boon to Irish genealogists because it means you can be confident you are correctly matching each of the couple's children. In areas where surnames are especially common, this would not otherwise be the case. It also means you can trace your family history on your maternal lines as easily as your paternal lines.
(Well, that's the theory, at least. It isn't always so easy in practice!)
Most marriages took place in the bride's 'mother' church, ie the place where she was baptised. The wedding ceremony was usually held in the afternoon or early evening, and Christmas Eve and St Stephen's Day (26 December) were popular dates.
A marriage entry typically includes the first name, surname, age, father's name and occupation, and place of residence for each of bride and groom. In addition, the address of the church where the ceremony took place is provided, as is the name of the officiating priest, and the names of two witnesses.
The latter are often a brother or best friend of the groom and a sister or best friend of the bride but this is not always the case.
The place of residence was sometimes omitted in earlier registers but after the 1860s this became rarer because priests were provided with new registers which included a section for addresses.
Less than one-third of Ireland's surviving 325 burial registers date from the 19th century and about half don't start until after 1850. For example, each of Co. Longford's 20 parishes has a surviving burial register, the earliest dating from 1782, the latest starting in 1853/4.
Compare that with Co. Cork, the island's largest county, where no burial registers survive, and Co. Clare, where only one register survives and that covering less than four years from 1844.
Where they do survive, Catholic burial registers contain only the name of the deceased and the date of burial. That's it. Which is why they are not of much value genealogically.
Don't forget to check the burial registers of the local Church of Ireland if you can't find what you are looking for in the Catholic register.
In the 19th century, new Catholic parishes were created (you can find out more about parishes on the Irish land divisions page). As a result, the starting dates given for may registers may not look very promising. Don't be put off.
Many parishes changed their original geographical spread so you may well find there are earlier records for your ancestors' locality in the registers of an adjoining parish. Getting to know the geography of your ancestor's place of origin is therefore time well spent.
identifying the parish of your ancestors can be tricky and the only readily
available help is Lewis's Topographical Dictionary of Ireland. This was published in 1837, just one year after
Catholic emancipation ie just as the Catholic Church became free to expand. As
such, the information may have been superseded. None the less, it is a good
place to start.
Be especially relaxed about the spellings of names in Roman Catholic baptism, marriage and burial registers. Before the 20th century, only a small proportion of Irish people could read and write, and there was no standardised spelling of names such as there is now. With so many regional and local dialects, even phonetical spellings of the same name can show huge variation.