The BoingBoing-noted launch of a Google image search feature makes finding images sorted by Create Commons license much easier.
Take, for example this search for images labled unitarian or universalist that are available for reuse and modification, but not in commercial applications.
Useful, too: found this nineteenth-century picture of old First Universalist, Minneapolis, which looks like the spitting image of (still) First Universalist, Providence. Who knew? Makes me wonder if there was a relationship or influence, like through its ministers or through Tufts. (One of Tufts’s presidents of the period was a former minister at Providence.)