The history of erotic depictions includes paintings, sculpture, photographs, dramatic arts, music and writings that show scenes of a sexual nature throughout time. They have been created by nearly every civilization, ancient and modern. Early cultures often associated the sexual act with supernatural forces and thus their religion is intertwined with such depictions. In Asian countries such as India, Nepal, Sri Lanka, Japan and China, representations of sex and erotic art have specific spiritual meanings within native religions. The Greeks and Romans produced much art and decoration of an erotic nature, much of it integrated with their religious beliefs and cultural practices.
In more recent times, as communication technologies evolved, each new technique, such as printing, photography, motion pictures and computers, has been adapted to display and disseminate these depictions.
In early times, erotic depictions were often a subset of the indigenous or religious art of cultures and as such were not set aside or treated differently than any other type. The modern concept of pornography did not exist until the Victorian era. Its current definition was added in the 1860s, replacing the older one meaning writings about prostitutes. It first appeared in an English medical dictionary in 1857 defined as "a description of prostitutes or of prostitution, as a matter of public hygiene." By 1864, the first version of the modern definition had appeared in Webster's Dictionary: "licentious painting employed to decorate the walls of rooms sacred to bacchanalian orgies, examples of which exist in Pompeii." This was the beginning of what today refers to explicit pictures in general. Though some specific sex acts were regulated or prohibited by earlier laws, merely looking at objects or images depicting them was not outlawed in any country until 1857. In some cases, the possession of certain books, engravings or image collections was outlawed, but the trend to compose laws that actually restricted viewing sexually explicit things in general was a Victorian construct.