Revisiting the ‘informational city’: space of flows, polycentricity and the geography of knowledge-intensive business services in the emerging global city-region of Dublin, Regional Studies. The paper engages with the notion that the new spatial logic, underpinned by information and communication technology (ICT) and the ‘space of flows’, manifests itself in the form of ‘informational cities’ described as multinuclear spatial structures or polycentric city-regions in the knowledge-based economy. Focusing on the geography of knowledge-intensive business services (KIBS), the paper argues that there is little evidence of such polycentric pattern emerging within the Greater Dublin Region, Ireland. The exploration of factors underpinning weak decentralization tendencies of KIBS opens for reconsideration the concept of the ‘informational city’.