The Baroque saw significant changes in the art of sculpture; Bernini was at the forefront of this. The statues of the Renaissance masters had been strictly frontal, dictating the spectator to view it from one side, and one side only. Bernini's "David" is a three-dimensional work that needs space around it and challenges the viewer to walk around it, in order to contemplate its changing nature depending on the angle from which it is seen. The sculpture relates to an unseen entity – in the form of Goliath, the object of David's aggression – as well as to the spectator, caught in the middle of the conflict. The warrior even literally oversteps the boundaries between life and art, putting his toes over the edge of the plinth. The conventions of time, as well as space, were challenged. Instead of the serene constancy of, for example, Michelangelo's "David", Bernini has chosen to capture a fraction of time in the course of a continuous movement. Thus the latent energy that permeates Michelangelo's "David" is here in the process of being unleashed.