In this article David Wills, the Librarian of the Squire Law Library, offers a brief description of the extraordinary range of architecture at the University of Cambridge with particular reference to the David Williams Building, designed by the world-renowned architects Foster + Partners. He suggests that, in the context of the Squire Law Library, which occupies the top three floors of the David Williams Building, the building has truly come of age; he looks at some of the features and challenges of its modern design; and notes that the building looks set to play a major part in the education and research activity of legal scholars and university students into the distant future. This article is a personal reflection based on the author's experience of using and working in the building for some 26 years since it was constructed and opened in the mid-1990s.