This is St. Dominic Catholic Church in the Old Highlands District of Denver, Colorado.
This large Gothic style church was the second St. Dominic's in Denver, both of which, fittingly enough, were and are Dominican churches. The church was originally associated with a school, but the school closed in 1973. The Church itself was built in 1926, replacing one that had been built in the late 19th Century.
The rectory for the church stands next door and is just a bit older, having been built in 1923.
