Almost lost amongst the modern towers of downtown, Knox United Church has occupied this corner since 1913. It was designated a historic resource in 1980, and a plaque was placed just outside the large front door which encapsulates the history as follows:

"Knox Presbyterian Church was the fourth in a series of churches constructed to serve the needs of the Presbyterian congregation in Calgary which was first established in 1883. The present structure was dedicated on September 14, 1913. In 1925, it became known as "Knox United" after the congregation voted to hoin the newly formed United Church of Canada.

Built of Paskapoo sandstone under the architectural direction of F. J. Lawson, the structure features a square corner tower, gothic windows characteristic of the time and a large Casavant pipe organ built in St. Hyacinthe, Quebec. Once the tallest building in Calgary, the church remains a prominent landmark despite the density of the surrounding development. It has often been referred to as "the cathedral of the west".

In recognition of the significance of both the structure and its congregation, Knox United Church was designated a provincial historic resource on July 4, 1980 by the Hounourable Mary J. LeMessurier, Minister of Culture.