Sunnyside Royal Hospital was open for 230 years before its closure, and was the oldest asylum in Scotland.
The hospital was originally founded in 1781 by Susan Carnegie as the Montrose Lunatic Asylum, Infirmary & Dispensary and obtained a Royal Charter in 1810.In 1834, the Governors of the asylum, carrying out the wishes of Mrs Carnegie (who had strongly advocated the appointment of a medical specialist in insanity) appointed the phrenologist William A.F. Browne as medical superintendent. Browne was to prove an inspired choice and an energetic and resourceful leader. He regarded public education as part of his duties, and gave a series of lectures which became enormously popular and influential. In 1837, five lectures were published together under the title What Asylums Were, Are and Ought To Be; this book came to the attention of the Dumfries philanthropist Elizabeth Crichton. She travelled to Montrose, interviewed Browne and offered him the equivalent post at the Crichton Royal in Dumfries. Crichton offered Browne a raise from £150 to £350 per annum. Browne was succeeded at Montrose by Richard Poole, an early psychiatric historian, and, later, by Dr James Howden, who identified cases of pellagra in the asylum.In 1858, a new improved asylum was completed to the north of Montrose in the village of Hillside on lands of the farm of Sunnyside and the old site was vacated. This site was further developed with the construction of a new facility for private patients called Carnegie House in 1899. Despite this addition, overcrowding was a problem, as the asylum's patient numbers had grown to 670 by 1900. This situation required additional building work to be undertaken. Consequently, two new buildings - Howden Villa (1901) and Northesk Villa (1904)- were added to the facility. Additional staff were required to care for the additional patients and the Westmount Cottages were built in 1905 to house them. In 1911 the lease of Sunnyside Farm finally expired and over 52 acres were purchased for the sum of £4500. A further development was the addition of Angus House, which was built in 1939 to accommodate elderly patients suffering from dementia. In 1948, the National Health Service 1946 (Scotland) Act brought the hospital under control of the Eastern Regional Hospital Board. Its name was changed from the Royal Asylum of Montrose to the Royal Mental Hospital of Montrose. In 1962 it became Sunnyside Royal Hospital and came under the jurisdiction of new management. During the 1950s and 1960s, the introduction of new drugs lessened the need for prolonged admission of patients. In addition, the Mental Health (Scotland) Act of 1960 also significantly altered legislation in respect of mental illness and reduced the grounds on which someone could be detained in a mental hospital.The site was officially closed in late 2011 and most patients were sent to a new £20 million build at Stracathro Hospital, (also in Angus)- the Susan Carnegie Centre. Others were placed in the community.