Beauty is often defined as a subjective aspect of certain objects, which makes these objects pleasant to see. Such objects may include sunsets, landscapes, humans and artistic works of art. Beauty, along with aesthetic sense, is arguably the most significant area of aesthetic theory, one of the most important branches of science. The word ‘beauty’ has come to denote all things beautiful in the world, including beauty in the physical realm, in addition to its usage in the aesthetic and artistic domain. ‘Appealability’ is also related to beauty, as is ‘symmetry’, ‘uniqueness’ and the like.