St. Brendan's Hospital (Irish: Ospidéal Naomh Breandán) was a psychiatric facility located in the north Dublin suburb of Grangegorman.

[1] It is now the site of a modern mental health facility known as the "Phoenix Care Centre".

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.

[2] As such the Phoenix Care Centre represents the continuation of the oldest public psychiatric facility in Ireland.

Initially, it was established as a national asylum to receive curable lunatics from throughout the island of Ireland.

[13] In June 2010, the Mental Health Commission instructed the hospital to stop the admission of acute patients on account of the "entirely unacceptable and inhumane conditions".