There doesn't seem much mention of gothic in that https://en.wikipedia.org/wiki/And_did_those_feet_in_ancient_...
One of the interpretations of the poem is that it criticises organised religion and that the mills in question are the church as an organisation represented in concrete terms by the church buildings.
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One of the interpretations of the poem is that it criticises organised religion and that the mills in question are the church as an organisation represented in concrete terms by the church buildings.