Erotic art is a broad field of the visual arts including any artistic work intended to evoke erotic arousal, usually depicting human nudity and/or sexual activity. It has included works in almost any visual medium, including drawings, engravings, films, paintings, photographs, and sculptures. Some of the earliest known works of art include erotic themes, which have recurred with varying prominence in different societies throughout history. However it has also been widely considered taboo, with either social norms or laws restricting its creation, distribution, and possession, particularly when it is deemed to be "pornographic", "immoral", or "obscene".