Brutalism and Solar Architecture—two architectural movements which co-existed in the 1970s and 80s—are not like peas & carrots. You don't necessarily think of them as complementary.
Yet behold the Central United Methodist Church, built in Milwaukee in 1982. It was designed by William Wenzler and Associates. The bell tower has tall south-facing windows to accommodate a solar heating system which was to be installed behind them. A solar campanile! Also, south-facing rooms designed for passive solar heating, with proper shading. Plus earth berms.
See also: A Few Thoughts on Brutalism