This chapter explores the concept of the Architecture Repository. The TOGAF Standarddescribes the repository as an intangible concept in which all aspects of the architecture are collected and stored. The chapter delves into the various aspects of the Architecture Repository and explains each one in detail. The relationship and connection between components are discussed at length, as is a method for making the repository tangible through appropriate architectural tools. One of the three continua described in this chapter can be used to access stored assets at any time. Key components that are stored in the repository, such as principles, building blocks, viewpoints and views, and the three continua are explained in more detail. How they can be created and used in the context of an architecture problem or challenge is covered in this chapter.