 Soon, however, he felt a desire to extend the field of his activity.He went to Paris, where he was appointed (June 1, 1869) secretary of the Alliance Israélite Universelle, which position he held until his death.It was largely due to Loeb's labors that this association became an important factor in the progress of Oriental Judaism; and he created the library of the Alliance, which is one of the most valuable Jewish libraries in existence.