It's been over 20 years since I read it, but I believe that the statue things was part of an attempt to show Calvin and others were mistaken about the claim of a contradiction between two of the Councils concerning icons. IIRC Calvin deals with in it in a sentence or two in Book 4 of the Institutes under Ecumenical Councils.

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Tim Vaughan, 48 years old, member PCA church but currently attending EV Free church. San Luis Obispo County, California.