The thesis explores museums’ influence on their users’ mental health. Firstly, the mental health disorders mentioned within the thesis (dementia, depression, anxiety, PTSD) and the issue of social isolation are explained. The social and educational roles of museums are highlighted, as well as the corresponding activities performed for the sake of improving the visitors’ wellbeing and lowering the stigma against persons who struggle with mental health disorders. Museums’ obligation in re-socializing their visitors and creating a realistic image of human psyche is indicated. Art therapy is defined as one of the most common methods of mental health initiatives in museums, with a historical overview of the experts who first developed this form of therapy. American and British associations of art therapy are listed as two of the leading world organizations in this field. Examples of art therapy initiatives in the USA, the U.K., Greece, and Croatia are also identified. Museums’ effects on their visitor’s emotions, thoughts, and experiences are explored (with an example of preventing depression and dementia among the elderly.) Two exhibitions are described, one specifically dedicated to depression and one to the human mind generally, along with the visitors’ reactions to those subjects. The most common obstacles to implementing social work and psychiatric methods in museums are highlighted, paired with advice on dealing with them. Examples of psychiatry museums in Croatia, Italy, the U.K., and Denmark are illustrated in conclusion.