History provides ways of knowing and understanding the past: what happened, who participated in the event, when and where did it happen, and not least how and why did it happen. Nursing history provides nurses with knowledge about their past, but is also provides ways of understanding today’s issues and offers a way of getting an insight into the future. History teaches us who we are and represent a significant source of identity for nurses. The aim of this article is to examine the methodology of history in order to contribute to understanding of nursing history. This may also assist and inspire nurses to use, read and to do historical research in nursing. The research process is presented through 5 steps. These steps intend to serve as a guide for understanding and doing historical research. Each step is explored and described, and material from the authors own historical research is used to exemplify the steps in the research process.