Church at St. John’s Abbey (Collegeville, Minnesota, 1961) 

In 1950, Abbot Baldwin Dworschak solicited forward-thinking designs from leading architects to remake his Minnesota church and create a monument to the service of God. Breuer answered the call. There's a certain majesty to the bell tower greeting the faithful, a massive panel supported by a curvaceous stand. That Breuer then follows it up with the church itself, with a massive wall of hexagonal stained glass and concrete tresses, makes this a classic.

Photo Credit: Wikimedia Commons  Photo 7 of 12 in Design Icon: 10 Buildings by Marcel Breuer