 <translate> To answer this question, we should know that: The Treaty of Paris (1951) establishing the European Coal and Steel Community established a right to free movement for workers in these industries and the Treaty of Rome (1957) provided a right for the free movement of workers within the European Economic Community. So the final answer is 1957. <yor> Láti dáhùn ìbéèrè yìí, a gbọ́dọ̀ mọ̀ pé: Àdéhùn Paris (1951) tí ó dá Ẹ̀ka Iṣẹ́-Iṣẹ́ Irin-Ilẹ̀ Yúróòpù sílẹ̀ dá ẹ̀tọ́ fún ṣíṣí-kiri fún àwọn òṣìṣẹ́ ní àwọn ẹ̀ka-iṣẹ́ wọ̀nyí àti Àdéhùn Rome (1957) fún ẹ̀tọ́ fún ṣíṣí-kiri fún àwọn òṣìṣẹ́ nínú Ẹ̀ka Iṣẹ́-Iṣẹ́-Iṣẹ́-Ilẹ̀ Yúróòpù. Nítorí náà ìdáhùn tó gbẹ̀yìn ni pé ọdún 1957. 