The establishment of Latin Christianity in Poland had a profound impact on its development, and this is the subject of the present volume. The articles range from surveys tracing the main phases of this evolution and the Church's expansion between the 10th and the 16th centuries, to particular studies of parish organisation and the role of the monastic orders - above all the Mendicants, whose importance Professor Kloczowski considers has been much underestimated. In addition, he has also been concerned to relate developments in Poland to those in the neighbouring parts of east-central Europe, in Bohemia, Hungary and, later, in Lithuania, and to trace the ties linking the area with the West, and especially with Italy. La fondation de la chr tient latine en Pologne a eu un impact profond sur son d veloppement; ceci forme le sujet du pr sent volume. Les articles vont d' valuations retra ant les principales phases de cette volution et de l'expansion de l'Eglise entre le 10e et le 16e si cle, des tudes sp cifiques sur l'organisation paroissiale et le r le des ordres monastiques - surtout les Mendiants, dont l'importance, selon le professeur Kloczowski, a t beaucoup trop sousestim e. Il s'est aussi attach tablir les rapports entre les d veloppements en Pologne et ceux dans les parties avoisinantes de l'Europe de l'Est centrale, en Boh me, en Hongrie et, plus tard, en Lithuanie. Il tente aussi de retracer les liens unissant cette r gion l'Ouest et, plus particuli rement l'Italie.