In 1925 he came in direct service of the Holy See. He was consecrated bishop the 19th of March 1925 in Saint Carlo al Corso in Rome, and he was nominated Apostolic Visitor in Bulgaria. He suffered a lot for the most difficult social, political and religious situation. But with his sympathy, simplicity, heart and cleverness he managed to have the friendship of all. It’s enough to cite his program concerning the orthodox church, expressed in his first speech: “ It’s not enough to feed cordial feelings towards our separated brothers: if you truly love them, give them a good example and bring your love into action”. In 1934 he was moved to the Apostolic Delegation of Turkey and nominated Apostolic Administrator of the Latin Church in Istanbul. Here he became useful to the persecuted Jewish community, having good relationships with the diplomatic body and with the pontifical representatives of the danubian countries. In December 1944, Pious XII appointed him as Apostolic Nuncio in Paris, where he gave his credentials the 1st January 1945. In France, too, he found a very difficult situation because a lot of bishops were in touch with the German enemy and for the problem of the worker-priests. Also here with his balance and his simplicity and loveliness, he managed to solve the problems and get along with the French people and all the diplomatic body.