Martin Puryear’s huge wooden structure, sheathed in chain-link fencing and capped with a gold-leafed shackle, towers over Madison Square Park’s main lawn like a seated animal. Its shape echoes the Phrygian cap, associated with French revolutionaries and freedom and explored recently by the artist, and is topped off with a gorgeously gleaming shackle – a gilded symbol of servitude. (At Madison Square Park through January 8th, 2017).