[1] The architect was James Renwick Jr., who also designed St. Patrick's Cathedral in New York, the Smithsonian Institution Building in Washington, D.C., and a very similar church, the Christ Church by the Sea in Colón, Panama.

[2] On August 10, 1979, the cathedral and its guild house were added to the National Register of Historic Places.

On February 19, 1982, there was a boundary increase to add the bishop's residence to the National Register.

Our Merciful Saviour was founded by Bishop Henry Benjamin Whipple, who is buried beneath the altar.

In 1941 St. Mark's Episcopal Cathedral in Minneapolis was dedicated as the seat of the bishop for the Episcopal Diocese of Minnesota, but the Cathedral of Our Merciful Saviour retains its status as a full cathedral as well.