International Gallery
From Tardis Wiki, the free Doctor Who reference
The International Gallery was an art museum in London.
Lady Christina de Souza stole the Cup of Athelstan from there in 2009. (DW: Planet of the Dead).
The Mona Lisa by Leonardo da Vinci was shown here later that year. (SJA: Mona Lisa's Revenge)
The name is a play on the National Gallery.