This paper explores patterns of voting in the Council of the European Union. We analyze the full set of voting records for this institution between 2003 and 2009, i.e., under the Treaty of Nice. The relationship in voting behavior between two countries is measured by Spearman’s rank correlation coefficients. Based on this relationship, we determine the support for the positions member states take in the Council. We evaluate whether these correlations can also be used as a prediction of future voting behavior, and we identify the effect the Treaty of Lisbon has on the support for the positions of the member states. (Coauthor Marco Fantini (DG-TAXUD, European Commission).)