Superior information technology and global network coverage - the Internet, have raised the issue of sustainability and library facilities in the 21st century. Architects across the globe endeavor to examine and improve the traditional concepts of designing a library in accordance with the complex needs of the contemporary society. In this paper, the tools for development and protection of the library buildings in the information age are presented. The goal is to shed light on the complex

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... s of revitalizing the libraries that today, more than ever, are fighting for sustainability. In this endeavor, an analysis of the case study of some of the world-renowned libraries will be of particular importance.