This mural painting was discovered in 1908 in an attic in the Gunter Mansion (34 - 40 Cross Street), Abergavenny.

During the latter half of the 17th century, Thomas Gunter, an attorney and staunch Roman Catholic, used the attic as a chapel with Fr David Lewis and Fr Phillip Evans. At this time, Catholics were persecuted in Britain and were forced to meet in secret meeting places such as this one. In the wave of anti-Roman Catholicism following the wake of the Titus Oates Plot in 1678, both priests were hanged, disembowelled and burnt at Usk.