The subject of this study is an illustrated manuscript made in Vienna in 1413, which is keept in the Central Library of the Piarist Order in Budapest in 1979. The codex contains Concordantiae Caritatis, a typological work by Ulricus, a 14th century Cistercian monk from Lilienfeld. The illustrations are mentioned in recent art history as especially important in respect of the origins and history of Viennese painting in the first third of the 15th century. The manuscript is studied here as a whole with the aim of distinguishing different artists' hands for the first time. The paper deals with the problems of attribution on the basis of parallels of style, and the question of models. The author proposes the participation of seven hands or groups of collaborators. One of them (referred to here as group 1) is placed in the circle of the Master of the Sankt Lambrecht panel, other pages (referred to here as group 2) are related (e.g.) to the so called Mettener Biblia Pauperum, made in Bohemian-like style.