The Helsinki Central Library, designed by FIRM a.d. and OKB Architecture, is a hub of knowledge, where different people, communities and constituencies can come together. With their concept of ‘Geologies of Information’, their design expresses how if libraries were like sedimentary rocks, where layers of knowledge accumulated over time, libraries of the 21st century are like igneous rock in which different mediums of knowledge and learning are fused into a granular heterogeneous whole. More images and architects’ description after the break.