Page "Tractatus Logico-Philosophicus" Paragraph 51

A prominent view set out in the Tractatus is the picture theory.

The picture theory is a proposed description of the relation of representation.

This view is sometimes called the picture theory of language, but Wittgenstein discusses various representational picturing relationships, including non-linguistic " pictures " such as photographs and sculptures ( TLP 2. 1 – 2. 225 ).