This half-day seminar, organised by Directorate E – Horizontal Policies and Networks in close co-operation with the COTER and  ECON Secretariats, will endeavour to foster discussion within the Committee of the Regions (CoR) on how to monitor polycentric territorial development in Europe using novel indicators (beyond GDP and NUTS II).Many research projects are currently addressing the following question: how can we define and measure regional development in order to identify the best policies? The polycentric territorial development model, which should lead to the introduction of new indicators beyond the nomenclature of NUTS II, will be the overarching theme of discussion during the seminar.  The workshop aims to address the following questions:  What are the patterns of territorial development that can better foster growth and employment?Is a polycentric Europe a means of reducing disparities within Europe and between European regions?How can we define and measure the driving forces for a more territorially-balanced Europe?