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During the Penal Laws in Ireland - in particular during the 18th century - the Catholic church was oppressed and public ceremonies involving Catholic clergy were banned. Many Catholic churches had also been either destroyed or put to use by the Anglican religion
during the period following the Battle of the Boyne (1690).
Nonetheless, Irish Catholics remained faithful to the celebration of the Mass and two new traditions emerged: the Mass rock and the Station Mass. Catholics gathered in the open countryside at a designed spot marked by a rock to celebrate Mass. Usually, the priest arrived in disguise and placed the sacred vessels on the rock while assigned locals kept a look-out from vantage points in the landscape from where they could see any approaching English militia.
The Irish countryside is still littered with these Mass rocks and they are still considered to be special sacred places. The alternative venue for Mass was in people's homes. Word was put about locally that Mass would be said in a particular house on a particular day. The neighbours would gather for what was often the only opportunity to be at Mass for a long time. Because it was not safe for the priest to carry sacred vessels or vestments with him on his journeys, these were taken care of by the local people. They passed the "Mass kit" from house to house as it was needed.
This Mass became known as the "station Mass" because of the random movement from place to place. In some areas, some houses became known locally as regular venues for Mass and became known as Mass houses. More of these emerged as the Penal Laws were repealed but the Catholic community still did not have resources to build enough churches. Gradually, during the first half of the 19th century, churches were built across the countryside to replace the Mass houses.