The plinth, designed by Sir Charles Barry in 1841, remained empty until 1998 when it became the home for contemporary sculptures, including Marc Quinn's Alison Lapper Pregnant in 2005 and Anthony Gormley's One and Other in 2009.

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After the move, the building will become a new home for the Metropolitan Museum of Art's collection of modern and contemporary art.

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And not just his home: Puig i Cadafalch's Casaramona textile plant - now the CaixaForum museum of contemporary art - looks more like some extravagant fortified palace.

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