[2] The church with its adjoining cemetery was added to the National Register of Historic Places (NRHP) in 1985.

The earliest standing tombstone bears the date 1771 and marks the grave of Thomas Maguire.

[2][4] Major improvements were made to the building in 1865, and again in 1937, in preparation for the church's centennial.

In the early 1990s major roof repairs were made, air conditioning was added and a port-a-potty was brought in.

[3] Services at St. Malachi had been celebrated irregularly in the 1930s and 1940s and starting in 1952 were scheduled only three or four times annually.

About 1730 Presbyterians established a well-known church and religious school at Faggs Manor about five miles southwest of St. Malachi.

In 1757 there were only 55 Irish Catholics (32 male, 23 female) counted in Chester County.