Agreement remained elusive and a seat had to be found before the institutions could begin work, hence Luxembourg was chosen as a provisional seat, though with the Common Assembly in Strasbourg as that was the only city with a large enough hemicycle (the one used by the Council of Europe).
Kesepakatan sulit didapatkan dan lokasi kantor pusat harus ditetapkan sebelum lembaga mulai bekerja, maka Luksemburg terpilih sebagai tempat kantor pusat sementara, meskipun Majelis Umum berpusat di Strasbourg karena merupakan satu-satunya kota yang memiliki hemicycle berukuran cukup besar (yang digunakan oleh Majelis Eropa).