Well, the high schools that look like this are generally from 1900-1940 in down-market Collegiate Gothic style, in imitation of the great Ivy League schools. Knox College came from a less wealthy time, long before the big schools started pretending that they were in England. Considering that northern European architecture is all very similar, it is quite possible that the model of this school is really Swedish, since it’s by a Swedish immigrant.
There’s a fair amount of Norman Revival around here, in quarried stone. It’s more interesting to look at and to ponder, to me, due to the combination of very pleasing proportions with a vaguely threatening aspect, a certain tension that keeps you looking, keeps things interesting.