A historical marker on the rectory identifies the location as the place where Hessian Commander Col. Johann Gottlieb Rall died on December 27, 1776.

[1] St. Mary's was the second Catholic parish established in Trenton after St. John's, which was located on the present site of Sacred Heart Church on South Broad Street.

[2] Ground was broken for the parish church on April 23, 1866, and it was dedicated on January 1, 1871, by Bishop James Roosevelt Bayley of Newark.

Bishop Michael J. O'Farrell was consecrated on Cardinal John McCloskey at St. Patrick's Cathedral in New York City and enthroned in St. Mary's on November 17, 1881.

[1] The present cathedral church was dedicated three years later on March 14, 1959, by Bishop George W. Ahr at a Pontifical Mass celebrated by Newark Archbishop Thomas A. Boland.

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