The parish church, designed by Sir Robert Lorimer, was built from 1906 to 1907, and the nave was extended from 1928 to 1929.

[3] The church was founded by Canon John Gray and Marc-André Raffalovitch.

In 1901, Gray resigned as librarian at the Foreign Office to become a priest of the Catholic Church.

[1] Perceiving the need for a new parish to serve Morningside, on 31 March 1905 Archbishop James Smith arranged for Fr Gray to leave his post at St Patrick's and take charge of the new parish of St Peter's.

[1] Following the liturgical reforms of the Second Vatican Council, much of the church furniture, designed by Lorimer, was removed.