The main aim of this paper is to show that behind the complex and fluid surface dimension of the Polish political scene it is possible to reveal a relatively stable two-dimensional structure of deep political identities. The study is based on the analysis of ecological data — the results of elections from 1990 to 1997. The results prove the exceptional stability of the Polish electoral geography and appear to be consistent with other studies based mainly on the survey data. The use of the spatial data allowed us to reveal the historical and spatial determinants of electoral behavior in Poland.