St Thomas's graveyard served the dead of its parish for nearly two centuries, and then, in the 1920s, its occupants were quietly moved elsewhere, leaving behind a site whose original purpose had been all but erased.

According to Dublin Public Libraries, writing in 1990, the graveyard was in active use from around 1700 until 1882, a span that covers some of the most turbulent and transformative periods in the city's history. The church and its adjoining burial ground were damaged during the period between 1916 and 1922, years that saw significant destruction across Dublin as the Easter Rising, the War of Independence, and the opening phase of the Civil War reshaped the city physically as well as politically. The damage proved too much to recover from, and by the mid-1920s the remains interred there had been exhumed and re-interred at Mount Jerome Cemetery in Harold's Cross, a large Victorian cemetery on the south side of the city that became a repository for several displaced burial populations during this era.

For anyone trying to locate the site today, the absence of the church itself makes orientation considerably harder. There is no obvious monument or marker drawing attention to what once stood here, which is part of what makes the place quietly remarkable. The story of the graveyard is largely a story of erasure, of a community's burial ground absorbed into the disruptions of a particularly violent decade and then tidied away. Visitors interested in tracing what remains might find the records held by Dublin Public Libraries a useful starting point, since the physical evidence on the ground is minimal. Mount Jerome, for those wishing to follow the thread further, is accessible and well-documented, though the connection between the two sites is not prominently signposted there either.