Opened in 1751, Saint Luke's Hospital was determined to "cure" insanity. Originally built to house up to 25 patients, but had to be remodeled and expanded for the reception of more patients. It was soon expanded toallot for 300 cells. Originalyl built to house 'pauper lunatics' they soon began housing middle class patients as well. Patients were released in 1916 due to The Bank of England purchasing the property and becoming a printing property. 

Works Cited:

https://en.wikipedia.org/wiki/St_Luke%27s_Hospital_for_Lunatics