The IoD occupies the Grade I listed 116 Pall Mall in London, which is open to members of the IoD, and has rooms and function suites available for commercial hire. The building is owned by the Crown Estate, along with the large collection of artwork that decorates the rooms. Until 1978, the building was run by the United Service Club. The building was designed by John Nash, the 19th-century architect who also designed the Brighton Pavilion and Marble Arch, and constructed between 1826 and 1828.
 
Interesting facts...
A particularly interesting story is that Ian Fleming visited regularly during the war while serving in Naval Intelligence. King Haakon VII of Norway also met his officers there in the Smoking Room, now the restaurant, and that wartime relationship links the building to the tradition of Norway’s annual Trafalgar Square Christmas tree.