The relationship between beauty and necessity is spelled out by way of “tweaking” three very different theories of beauty, those of Aristotle, Kant and Denis Dutton. From Aristotle we take the idea of mimetic art as seeking out a “deeper” truth than the contingent truths of history. We suggest that art actually seeks out concrete manifestations of logical necessity in the world. Kant directly links beauty to necessity by way of his somewhat obscure notions of “subjective necessity” and “universal assent”. Introducing our notion of inner logic to Kant’s description clears up the picture considerably. Lastly, a glaring lacuna in Dutton’s evolutionary account of the development of beauty is filled also by using the notion of internal logic. Accordingly, beauty is defined as that which manifests and exhibits the inner logic of its world. This is a second-order definition, which explains why beauty can be found in so many different settings, and why our encounters with beauty always bear that peculiar compelling sense of “Oh, you have got to see this!”.