Royal National Hospital for Rheumatic Diseases

The Royal National Hospital for Rheumatic Diseases is a small, specialist NHS hospital on the Royal United Hospital (RUH) site in the northwestern outskirts of Bath, England. The hospital was founded in 1738 as a general hospital for the poor in the city centre, where the frontage of its building still reads Royal Mineral Water Hospital. Thus it is known locally as "The Mineral Hospital" or "The Min". The hospital moved to a new building at the RUH site in 2019.

From the 16th century, the needs of the "deserving poor" who came to take the healing waters of the Roman Baths were recognised and they were allowed free use of the waters. This attracted beggars; large numbers of people visited the city but St John's Hospital was only accessible to local residents. Proposals in 1716 for a hospital to receive them were supported by Lady Elizabeth Hastings, Henry Hoare, Joseph Jekyll, William Oliver, Beau Nash and others. The hospital was established in 1738 as The Mineral Water Hospital. It provided care for the impoverished sick who were attracted to Bath because of the supposed healing properties of the mineral water from the spa. The original building, designed by John Wood the Elder, was built with Bath stone donated by Ralph Allen and completed in 1742. A fine pediment, in Bath stone, on the 1860 building depicts the parable of the Good Samaritan. The hospital was named by the Health Service Journal as the best acute specialist trust to work for in 2015. At that time it had 208 full time equivalent staff and a sickness absence rate of 3.18%. 91% of staff recommended it as a place for treatment and 79% recommended it as a place to work.

It was announced in January 2015 that the Royal National Hospital for Rheumatic Diseases NHS Foundation Trust would be taken over by Royal United Hospitals Bath NHS Foundation Trust, after financial debts had built up toward £2million. During 2015 and 2016, some services were transferred to the Royal United Hospital (RUH), including endoscopy and children's services. Construction started on a building at the RUH's Combe Park site in November 2017, to house the Royal National Hospital and the Brownsword Therapies centre. The first departments from the Mineral Hospital and the RUH transferred to the new building in September 2019, and all services were transferred to the RUH site by the end of that year. Camilla, Duchess of Cornwall, who is President of the Royal Osteoporosis Society, formally opened the hospital and therapies centre on 22 October 2019. Five 18th century oil paintings from the Mineral Water Hospital were re hung at the RUH, notably a work of William Hoare titled Dr Oliver and Mr Pierce examining patients with Paralysis, Rheumatism and Leprosy.

The historic city centre site at Upper Borough Walls was offered for sale by the RUH Trust in 2017. It was bought by Versant Developments & Homes of Winchester, who sold it to Singapore based Fragrance Group in January 2018 for £21.5M. Fragrance Group, which owns other historic hotels in England, obtained planning permission in July 2021 to convert the building into a 160 bed hotel by removing 20th century additions and building an extension, while protecting Roman features. The planning committee of Bath and North East Somerset Council had rejected a 2020 application by Fragrance Group, after the proposed extension was criticised for its size and height.