Centre for Lusophone and European Literatures and Cultures Eça de Queirós and Father António Vieira, among other great Lusophone authors, through the publishing of previously unavailable sources and reference works, including complete works of the great figures from the History of Portuguese culture. The interchange of knowledge between Lusophone and European cultures has also been expanded, giving rise to interartistic studies (coordinated by Annabela Rita), to the imaginary of cultural studies (coordinated by José Eduardo Franco), to the studies on interculturality of the iberian world and the Slavonic world (coordinated by Béata Cieszynska), to the studies on the didactics of literature, the work in oral and traditional literatures,
Indo-European languages proposed Proto-Indo-European language (PIE) is the hypothetical common ancestor of the Indo-European languages, spoken by the Proto-Indo-Europeans. From the 1960s, knowledge of Anatolian became certain enough to establish its relationship to PIE. Using the method of internal reconstruction an earlier stage, called Pre-Proto-Indo-European, has been proposed. PIE was an inflected language, in which the grammatical relationships between words were signaled through inflectional morphemes (usually endings). The roots of PIE are basic morphemes carrying a lexical meaning. By addition of suffixes, they form stems, and by addition of endings, these form grammatically inflected words (nouns or verbs). The hypothetical Indo-European verb