Stuttgart City Library, inaugurated in 2011, designed by Yi Architects. The design of the reading rooms takes its inspiration from Étienne-Louis Boullée’s grand design vision of the French National Library at the end of the 18th century. Staircases arranged in pairs create flowing walkways between the floors. All the interior furnishings are colored in an unobtrusive, subtle grey. Only the book spines set bold color accents.