A negotiation that ends with a defeated party is never a good negotiation. I will consider everyone's interests and sensitivities. Even if our unity remains our strength, our diversity remains our wealth", he said, stressing the individuality of EU member states. Van Rompuy's first council meeting was an informal gathering in the Solvay Library in Leopold Park, rather than the more usual formal gathering in the Justus Lipsius building nearby. The meeting was called to reflect on long term structural economic problems facing Europe, but was overtaken by the Greek economic crisis. The role of "President-in-Office" of the assembled European Council was performed by the head of state or government of the member state currently holding the presidency of the Council of the European Union. This presidency rotated every six months, meaning there was a new president of the European Council twice a year. The role as President-in-Office was merely a "primus inter pares" role among other European heads of state or government. Being primarily responsible for preparing and chairing the meetings of the European Council, the role had no executive powers and was in no sense equivalent to that of a head of state. However, the president-in-office represented the European Council externally and reported to the European Parliament after its meetings as well as at the beginning and at the end of the presidency. The president's role is largely political, preparing the work of the European Council, organising and chairing its meetings, seeking to find consensus among its members and reporting to the European Parliament after each meeting; the president will also ""at his level and in that capacity, ensure the external representation of the Union on issues concerning its common foreign and security policy, without prejudice to the powers of the High Representative of the Union for Foreign Affairs and Security"". Some overlap between the roles of the president of the European Council, the President of the Commission, and the High Representative—notably in foreign policy—leaves uncertainty about how much influence the President of the European Council will acquire. There is further concern over whether the president will have sufficient personnel and resources to fulfil the duties of the post effectively and that, in lacking a ministry, the president might become a "play ball" between EU leaders. With the reorganisation of leading EU posts under the Lisbon Treaty, there was some criticism of each posts vague responsibilities. Ukrainian ambassador to the EU Andriy Veselovsky praised the framework and clarified it in his own terms: The president of the European Commission speaks as the EU's "government" while the new president of the European Council is a "strategist".