via https://historicengland.org.uk/

The National Heritage List for England (NHLE) is the only official, up to date, register of all nationally protected historic buildings and sites in England – listed buildings, scheduled monuments, protected wrecks, registered parks and gardens, and battlefields.

City Museum and Art Gallery, Portsmouth, Portsmouth

This building was built as military barracks. It was built in 1893 for the government’s War Office. It is one of the best examples of the French Chateau style of architecture in the country.