sentences:  The organizational coordinator of the SDL is the Silesian Library in Katowice.The SDL content and its main infrastructure is situated in the Silesian Library which supports the SDL domains, provides the Internet connection and administers its system.The Silesian Digital Library (SDL) was initiated by the founding Agreement between the Silesian Library in Katowice and the University of Silesia signed on July 20, 2006 by Prof. Janusz Janeczek (Rector of the University of Silesia) and Prof. Jan Malicki (Director of the Silesian Library).