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The Mass Rock, Larne is a post-medieval penal site consisting of a cross-incised boulder and associated monuments. Located in Larne, County Antrim, the site comprises a headless cross, the Priest's Grave, and what local tradition identifies as a penal altar. These elements mark a place where Catholic worship took place in secret during the period of religious prohibition, when priests were outlawed and public Catholic practice was forbidden under penal legislation.
The main feature is a boulder bearing an incised cross, situated on bedrock composed of Palaeogene extrusive rocks, the mafic lavas and tuffs that form the distinctive geology of this part of County Antrim. The headless cross and associated monuments reflect the clandestine nature of Catholic religious observance, where permanent structures were kept deliberately simple and easily concealed or destroyed if discovered by authorities.
The Mass Rock survives as a testament to the resilience of Catholic communities in Ulster during the penal period. The site is protected as a monument of historical significance by the Historic Environment Division of the Department for Communities, Northern Ireland, under reference number HB 2403. Such sites across Ireland mark locations where the faithful gathered at considerable personal risk to participate in the sacraments.
The mass rock, headless cross, headless cross, the priest's grave. cross-incised boulder - penal altar is a scheduled monument protected by Department for Communities NI under reference 2403. View the official record →
The Mass Rock, Larne is a post-medieval penal site consisting of a cross-incised boulder and associated monuments. It is designated a Scheduled Ancient Monument by DfC Northern Ireland (NISMR) under reference 2403.
The mass rock, headless cross, headless cross, the priest's grave. cross-incised boulder - penal altar dates from the post-med period, and is classified as a penal site. It is one of over 32,000 scheduled monuments protected across the UK.
The mass rock, headless cross, headless cross, the priest's grave. cross-incised boulder - penal altar is a Scheduled Ancient Monument, legally protected by DfC Northern Ireland (NISMR) — the body responsible for designating and safeguarding heritage sites in Ni. The official designation reference is 2403.
Several scheduled monuments lie within 10 km, including Mounds (2) and neolithic & bronze age pottery and flint scatters (5.8 km), Findspot of flint and pottery (6.1 km), Motte (6.3 km).
This page is just one thread. A full Aubrey report pulls together 14 strands of The mass rock, headless cross, headless cross, the priest's grave. cross-incised boulder - penal altar's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
The mass rock, headless cross, headless cross, the priest's grave. cross-incised boulder - penal altar stands on Unnamed Extrusive Rocks, Palaeogene, bedrock that formed in the Paleogene. The rock here is mafic lava and mafic tuff.