The Wikimedia Commons page describing the partnership gives the history of the images. “The images were brought to Sweden by architect Victor von Gegerfelt, probably during his visit to France during the 1850s. Among the photographers were Gustave Le Gray, Francis Bedford and Roger Fenton. The originals then hung on the walls of the Gegerfelt villa, where they were largely forgotten, until they were donated to Regionarkivet with other documents and pictures. The photographs were later rediscovered by an employee at the archive, put on display at the Hasselblad centre in Gothenburg.”
Having these images freely available on the internet means that they can be easily viewed by anyone in the UK for the first time. They were previously stored in special, climate-controlled storage vaults in Sweden.
This is a great example of the kind of partnerships that Wikimedia chapters can have with cultural institutions benefitting both sides. Wikimedia UK are keen to engage with institutions in Britain in projects like this – please get in touch if you would like to discuss this further.