Complex sentence: Symbolically, the chair Bernini designed had no earthly counterpart in actual contemporary furnishings: it is formed entirely of scrolling members, enclosing a coved panel where the upholstery pattern is rendered as a low relief of Christ giving the keys to Peter.
Split into simpler sentences: Symbolically, the chair Bernini designed had no earthly counterpart in actual contemporary furnishings. It is formed entirely of scrolling members, enclosing a coved panel where the upholstery pattern is rendered as a low relief of Christ giving the keys to Peter.