It shut down almost overnight nearly three years ago.
Since then Bootham Park Hospital has lain empty, as arguments rage over its future.
But these evocative photographs show what a beautiful building it is – and what York stands to lose if it is sold into private hands.
They were all taken by photographer Richard Brigham, who is known to thousands as the co-founder of the hugely popular York Past & Present website and Facebook page.
He was given exclusive access to the Grade I listed building, which dates from about 1777, in order to record its interior as an historical archive.
His pictures show the eerie emptiness of a health facility which was once busy with health professionals and their patients.
The former psychiatric hospital was closed abruptly with five days’ notice in September 2015 after a Care Quality Commission inspection found it unfit for purpose.
In January it was put on the open market for sale by its owners, the NHS.
But a Save Bootham Park campaign, led by York Central MP Rachael Maskell, to keep the estate in the public health sector, has gathered more than 4,000 signatures.
And City of York Council leader Ian Gillies wants the council to acquire the 18 acre site.
These pictures show that whoever wins the right to own Bootham Park Hospital will gain one of York’s great architectural glories.