At the opening of the twentieth century Sigmund Freud wrote that the role of psychoanalytic research is ‘to uncover connections by tracing what is manifest back to what is hidden’. 1 Some 50 years later Jacques Lacan developed Freud’s thinking on the part-object and unconscious. This chapter traces my own critical architectural research method, ‘part-architecture’, which develops a framework for analysing ana recovering the hidden or repressed past to a piece of architecture. Part-architecture is heavily influenced by Lacan’s psychoanalytic ideas and the art historiography of Rosalind Krauss. 2