These works included new windows, sashed, pulpit, reader's desk, tiles floors, alterations to the belfry and a new bell.

A large number of parishioners were buried in the churchyard, some of whose remains were transferred to Mount Jerome Cemetery when the land was developed at the turn of the 20th century.

O'Hanlon, keeper of the Record Tower in Dublin Castle, who was killed by Howley, one of the insurgents during the rebellion of Robert Emmet in 1803, is buried here.

Among his donations were over £12,000 in 1814 for the erection of a large stove-house near Cork Street for poor weavers in the Liberties, £8,000 for the building of the Meath Hospital, and his own house (67 Camden Street) for the provision of a school and orphanage for Protestant girls, along with £1,200 a per annum operational grant and funding for modest dowries for the girls.

[6] Owing to an influx of civil servants and its central location close to the centre of power at Dublin Castle the parish initially did have some wealthy parishioners.

The population continued to increase, especially during and after the Famine, when this part of Dublin was flooded with poverty-stricken country people looking for work and lodgings.

During a bad economic downturn in 1863 the Carmelite priest Father Spratt, from nearby Whitefriar St. Church, conducted house-to-house collections throughout the city to raise funds for the most destitute in the parish, which numbered 6,000.

[12] Arthur Keene (died 1818), a prominent member of the Methodist community in Dublin in its early days, was married to his wife Isabella by John Wesley in this church in April 1775.

[18] He collected a large amount of information regarding his church and parish, discovering a mine of wealth in the old registers, dating back to 1633.