St Mary’s Chapel in Holly Place, Holly Walk, Hampstead, London, NW3, was set up in the late 18th century by Roman Catholic refugees from the French Revolution with a purpose built building opening in 1816. The Chapel is still in active use and now known as St Mary's Church.
In 1814 the congregation was said to number 150, by that time mainly or solely English, who paid for a purpose-built chapel, which was opened in 1816. Abbé Morel was its priest, remaining in Hampstead until his death in 1852[1][2].