Technique décorative antique plébiscitée par l’art romain, le stuc connaît une véritable renaissance à Rome durant le XVIe siècle. À partir d’un intérêt pour une esthétique antiquisante, les artistes modernes ont intégré le stuc à des problématiques plus précises concernant le dialogue entre les arts et l’exploration des frontières implicites et explicites délimitant l’art et son espace de réception. Le stuc est en effet employé à la Renaissance aussi bien en architecture (pour les moulures et ornements, pour recouvrir la brique et donner une allure « marmoréenne » aux édifices), en peinture (pour servir de support à la fresque et y intégrer le relief) et en sculpture (pour l’exécution de reliefs figuratifs et de figures allant jusqu’à la ronde-bosse, intégrées le plus souvent à un décor peint). Loin d’opposer ces disciplines, le stuc les relie en s’emparant de leurs modes d’expression pour les faire cohabiter au sein du décor et, ce faisant, permet aux artistes d’adopter un point de vue réflexif quant à leur pratique, orienté vers l’investigation des moyens et natures de la représentation. Cette introspection se double, comme un corollaire, d’une investigation des effets de l’art et de sa capacité à convoquer le spectateur, à l’impliquer et l’intégrer au sein de la représentation afin de rendre plus mouvantes et fluctuantes les limites du décor. À partir d’une position « ornementale », voire « marginale », nombre de figures de stuc exécutées à Rome dès avant l’âge Baroque semblent vouloir offrir à la notion de frontière une application très originale, où les questions du simulacre et de la transgression se trouvent subtilement investies et convoquées. / As an ancient decorative technique favoured by Roman art, stucco is given a genuine renaissance in Sixteenth century Rome. Modem artists’ general interest in Antiquity includes more precise considerations regarding the possible functions of stucco in the dialogue between the arts, and explorations of the frontiers separating art from its beholder. Indeed, stucco is being used during the Renaissance in architecture (for the moulding and ornaments, to coat brick walls and give it a "marmoreal" appearance), in painting (as an intonaco for fresco) and in sculpture (to make figurative reliefs and free standing figures, generally combined with mural paintings). Far from opposing the arts, stucco connects them by taking possession of their modes of expression to make them work together inside the decorative systems and, doing so, gives the artists the opportunity to adopt a reflexive point of view regarding their practice, looking toward the investigation of the nature and means of representation. This particular introspection is also a research on the effects of art and its ability to convoke the beholder, to make him part of the representation and make more ambivalent the boundaries of decoration. From an "ornamental", even "marginal" position, numerous stucco figures executed in Rome before the Baroque age give the concept of aesthetic frontier an original instance, where simulacra and transgression are ingeniously summoned.

The Circle of architects of Albrecht of Wallenstein in early Baroque period. The first rare indications of early Baroque productions/ creations are appearing already in second decade of 17th century, mainly in the work of imperial architect Giovanni Mario Filippi. We can consider his work as a first stage of the architectonical production which was implemented for the one of the most important personality of the Thirty Year War - the duke Albrecht of Walenstein. The circle of Walenstein architects was created by three distinctive representatives, those proved successfully individually but also as a team working above the joint projects. They were able to fulfill the Wallenstein magnificent intentions. These architects were Andrea Spezza, Giovanni Pieroni and Nicola Sebregondi. These three Italians architects and builders were leading figures of the mentioned circle of which part were also Vincenzo Bocacci, Baccio Bianco and Giovanni Marini. Their activities is possible to trace on our territory in the period 1621-1634 except Giovanni Pieroni, who was focused after the duke death to the projects of fortification systems, mainly in Bohemia. Studies showed that the origin of architects, including the places where they have been raised and received the first training, was always important and influenced their...