1600–1650
In the early 1600s the Catholic clergy were targeted by government officials with frequent complaints of harassment and persecution by the authorities. Fines were imposed on ‘recusants’, i.e. those who would not attend the Established Church, and some of the funds raised were used to finance the construction of Protestant churches. However, despite these difficulties, the Catholic Church continued to maintain a witness.
By the late 1620s many of the northern dioceses has a resident bishop for the first time in decades, while Catholic worship was being conducted freely in many areas. For example, in Strabane, County Tyrone, Mass was openly said with the connivance of the Scottish settler population in the late 1620s. In 1631, it was noted that there were several mass-houses on the estates owned by the London companies in County Londonderry.
In north Antrim the Catholic Church received support from Randal MacDonnell, the 1st Earl of Antrim, who allowed Bonamargy friary to be used as a base for the Franciscans. He was also a patron of the important Catholic pilgrimage site at Lough Derg in Donegal.
For many of the Irish, the spread of Protestantism as a result of the Plantation was a major concern. In 1636, the Catholic bishop of Raphoe wrote to Rome ‘not without deep sadness of heart’ at ‘how thick [were] the weeds which the persistent heresy daily sows’ through the influx of Protestant settlers to his diocese.
In the mid to late 1630s the civil and religious policies pursued by the administration in Dublin led by the Lord Deputy, Thomas Wentworth, had a destabilising effect across all levels of society. Several of the leading Irish landowners in Ulster, most notably Sir Phelim O’Neill, began to make plans for an uprising, which began in October 1641. Before long the war had become an all-Ireland conflict, which continued for the rest of the 1640s.