St Pat's (as it is informally known) was consecrated as a chapel in a building behind Carlisle House on 29 September 1792, one of the first Catholic buildings allowed in Great Britain after the Reformation.
The present church building was built between 1891 and 1893, to designs by John Kelly of Leeds,[1] and replaced the earlier and smaller chapel built by Father Arthur O'Leary in the 1790s.
The church has an unusual longish shape due to plot constrictions given at that time.
[2] The main entrance has a Roman-style porch with Corinthian columns.
Above the entrance is an inscription: VT CHRISTIANI ITA ET ROMANI SITIS ("Ut christiani ita et romani sitis", i.e. “Be ye Christians as those of the Roman Church”).