The aim of the article is to analyse the spread and diffusion of socio-economic development in Poland in 2004-2016, while considering spatial aspects. Using the linear ordering method in the non-pattern version, a synthetic development measure for all municipalities in Poland was built based on a set of 77 features illustrating various socio-economic aspects, reduced to 25 features. For the measure constructed in this way, the convergence of the beta and sigma type has been examined, divided into 3 groups of municipalities (rural, urban and urban-rural), as well as in regional division. Using the methods of spatial econometrics, the occurrence of spatial effects was examined, in particular the attention was paid to the relationship between the processes of spreading development and spatial forms of diffusion of development. The analysis also allowed to determine the strength of local impacts of spatial connections between individual municipalities.

Presented paper consists of two parts: (1) experiences of spatial policy formulation on EU level and (2) preparation of new EU Territorial Agenda until 2030. In first part were elaborated milestones of previous activities on spatial policy in EU: European Spatial Development Perspective from 1999 and Territorial Agenda approved by member states in Godollo in 2011. Important element of paper was also description of changing background of spatial policy, primarily related to Lisbon Treaty introducing territorial cohesion. In XXI century crucial role was played by three generations of ESPON programme, embracing spatial pattern of European space, but also forecasting future of European territory until 2050. Catalysing role was played by the World Bank and OECD activities. In second part evidence concerning new Territorial Agenda was presented. Issue of spatial patterns of mega-trends implies priorities of new Territorial Agenda. Using territorial potentials and overcoming territorial barriers gives additional impetus to EU development. Problems which should be tackled are: risk of fragmentation, growing interdependencies between places and functional mismatch. For Poland involvement in activities leading to next Territorial Agenda of EU is of key importance.