DLR Lexicon, branded as dlr LexIcon, is a building in Dún Laoghaire, Ireland, housing the main public library and cultural centre of Dún Laoghaire–Rathdown County Council (DLR CC). It has attracted controversy, with opponents critical of its massive façade and its €36.6m cost at a time of austerity in Ireland, and supporters praising its interior, usability, and environmentally responsible construction.