A sanatorium is a medical facility designed for the long-term treatment of patients, particularly those with chronic illnesses such as tuberculosis. These institutions often provide a peaceful environment, focusing on rest, nutrition, and rehabilitation. Historically, they were popular in the late 19th and early 20th centuries, serving as places for patients to recover away from urban areas. Patients in a sanatorium typically received specialized care, including fresh air, sunlight, and a balanced diet. The concept has evolved over time, and while traditional sanatoriums have declined, modern equivalents like rehabilitation centers and wellness retreats continue to offer similar services for various health conditions.