This report delves into the life and work of Florence Nightingale, the founder of modern nursing, with a specific focus on her Environmental Theory. It examines her biography, highlighting her pioneering role and contributions during the Crimean War. The paper meticulously outlines the tenets of the Environmental Theory, emphasizing the nurse's role in manipulating the patient's surroundings to facilitate recovery. It elucidates the theory's relevance to modern nursing practice, including its support for patient-centered care and application in clinical settings such as psychiatric care. Furthermore, the report discusses the theory's contribution to nursing research, drawing parallels with other theories like Peplau's Theory of Interpersonal Relations. The report also includes a reflection report that discusses the group assignment process, highlighting teamwork, collaboration, and personal learning experiences. The references used in the report are also included.