 His knowledge and culture allowed him to occupy the function of librarian of the Congregation for the Evangelization of Peoples in Rome, having permission to research any type of document.In the Papal States, and later in Hungary and in Vienna (the capital of the Habsburg domains), he carried out research work in various libraries, copying and transcribing exactly any reference to the history of the Romanians.Șincai assiduously worked to educate commoners, dedicating himself to a career in teaching, and contributing to the establishment of an impressive number of Greek-Catholic parochial schools (in all, over 300).