Victoria and Albert Museum is home to extravagant Alexander McQueen robes, a golden Maharaja's throne and the world's oldest carpet. The Natural History Museum was London's most visited attraction in 2022 (closely followed by the British Museum and Tate Modern) The neoclassical domed National Gallery building dates from 1838.
Imagine if the Louvre and the d'Orsay Gallery merged into a building dominating Trafalgar Square, or one of the largest painting museums in the world.