"American entrepreneur Jay Walker& private library & so important (and massive) that his house was designed and built around it." From Flavorwire's 20 Beautiful Private and Personal Libraries. I want to build my house around my library!
Czech National Library in the Clementinum complex - Praga. The National Library was founded in The architecture is a notable example of Baroque architecture and Clementinum is the second largest complex of buildings in Prague after the Prague Castle.