Question: Which hospital can house more patients,  St. Elizabeths Hospital or the Psychiatric Institute of Washington?

 It offers behavioral healthcare to patients suffering from mental and addictive illnesses, including children, adolescents, adults and the elderly. The Psychiatric Institute of Washington (PIW) is an acute (104 bed) psychiatric hospital in Washington, D.C. Opened in 1967, PIW is a short-term, private hospital.  Services offered by PIW include inpatient, partial and intensive outpatient hospitalization, and group treatment programs for substance abuse and addiction. <SEP> St. Elizabeths Hospital opened in 1855 as the first federally operated psychiatric hospital in the United States.  Housing over 8,000 patients at its peak in the 1950s, the hospital at one point had a fully functioning medical-surgical unit, a school of nursing, and accredited internships and psychiatric residencies.  Its campus was designated a National Historic Landmark in 1990. <SEP> St. Brendan's Hospital was a psychiatric facility located in the north Dublin suburb of Grangegorman.  It formed part of the HSE mental health services of Dublin North East.  Its catchment area is North West Dublin.  Since the official opening of the Richmond Lunatic Asylum in 1815 the Grangegorman site has continuously provided institutional facilities for the reception of the mentally ill until the present day.  The majority of the buildings historically associated with the hospital have been either demolished, fallen into disrepair or closed down.  There are currently five wards still in use in the facility which are all situated in old buildings and which provide eighty-four beds for psychiatric patients.  In the 2008 "Report" of the Inspector of Mental Health Services it was recommended that acute admissions to the secure units 3A and 3B should cease due to their unsuitability and all admissions should be redirected to the new purpose built unit at Connolly Hospital, Blanchardstown, Dublin.  This new acute psychiatric unit was finally opened in Connolly Hospital on 29 November 2010 allowing for the commencement of the transfer of patients from St. Brendan's to Blanchardstown.  This is part of a process that will see all the old units at St. Brendan's retired as psychiatric facilities.  However, this does not signal the end of the use of the site for the provision of mental health services.  As part of the Grangegorman Development Plan, where a large portion of the site of the old hospital will be used to develop a new Dublin Institute of Technology campus, new modern psychiatric facilities are to be provided for the HSE mental health services for the region. <SEP> The New York State Psychiatric Institute, located in the Columbia University Medical Center in the Washington Heights neighborhood of Manhattan, New York City, was established in 1895 as one of the first institutions in the United States to integrate teaching, research and therapeutic approaches to the care of patients with mental illnesses.  In 1925, the Institute affiliated with Presbyterian Hospital, now New York-Presbyterian Hospital, adding general hospital facilities to the Institute's psychiatric services and research laboratories.