This document provides an introduction and background to the author's thesis comparing ancient prehistoric stone circles and modern land art works that incorporate stone and circles. It discusses how both sets of creators have been influenced by their natural surroundings and the cyclical movements of celestial bodies. In particular, it analyzes the frequent use of circles in works from the Neolithic period like Stonehenge and Avebury stone circle, and in modern land artists such as Andy Goldsworthy, noting how circles held symbolic meanings for prehistoric people and allow artists to interact with natural elements like the sun. The document also distinguishes how ancient works were communal efforts, while modern works can be individual or collaborative.