The picture above is of Trinitarian Congregational Church in Concord, Massachusetts.
Last year, I was in the Boston area on two different occasions. I spent some time in Concord with our youngest son, Chris. These visits got me thinking about the whole split of the Unitarians from the Congregationalists. There are many Unitarian and Congregational churches in Massachusetts, and several look similar from the outside.
One Congregational church in Concord makes their theological allegiance clear by calling themselves Trinitarian Congregational Church.
Update: I looked at Trinitarian’s doctrinal statement and it is not so clear what they actually believe about the trinity!