Derby Central Library was built in 1879 but has come under threat recently (Guardian, 27 July 2016)
The library shares the building with a museum and art gallery but they were closed on the Monday I was visiting. However within the library there is a gallery if you look up of old shop-like items.
The library was very busy, loads of stock, security guard, teenage section. All the computers seemed to be in use but I think there may have been a job club running.
It reminded me of Islington because whereas there I noted that the ornate plaster work and cornicing was all painted turquoise, in Derby it’s all painted a deep red.