This document provides an overview of the Old Testament references and allusions found throughout the Book of Revelation. It discusses how Revelation references the OT over 500 times without directly quoting it. It examines some of the specific OT passages that Revelation alludes to, such as the menorah, throne in heaven, four living creatures, horses and riders, and angels holding back the four winds. The document aims to show how Revelation draws heavily from OT imagery and prophecy.