@misc{RebeccaErika, author = {Rebecca Erika, Schmitt}, title = {The geometric design of Christoph Dientzenhofer's 'radical' vaults}, series = {Studies in Construction History: Proceedings of the Tenth Annual Conference of the Construction History Society}, volume = {2023}, journal = {Studies in Construction History: Proceedings of the Tenth Annual Conference of the Construction History Society}, editor = {Campbell, James}, publisher = {Construction History Society}, address = {Cambridge}, isbn = {978-0-9928751-9-0}, doi = {10.26127/BTUOpen-6408}, pages = {143 -- 155}, abstract = {Christoph Dientzenhofer (1655-1722) is considered one of the most important Baroque master builders of Central Europe. From his extensive architectural oeuvre, a group of six church buildings with geometrically complex forms stands out, recognised by architectural historians as particularly innovative and influential. These churches, located in Bohemia (Czech Republic), and often collectively referred to as the 'radical', 'dynamic', 'Guarinesque', or simply 'Bohemian' group, are: St. Joseph in Obořiště (1702-11), the Castle Church in Smiřice (1702-11), St. Nicholas in the Lesser Town of Prague (1703-11), St. Clare in Cheb (1707-11), St. Margaret in Břevnov (1708-16), and the Church of the Holy Assumption in Nov{\´a} Paka (1709-24). The brick vaults of these six buildings, sequences of oval domes and double-curved vault areas, are of particular interest for building research. In this study, the geometric design of the vaults of Dientzenhofer's 'radical' churches is documented, analysed, and compared using 3D laser scans of the buildings as primary source. The 3D models generated from the scans enable a geometric analysis through the method of reverse geometric engineering, breaking down the vaults' complex three-dimensional forms into their basic two-dimensional components: segments of circles with different radii and orientations, curved in one or two directions. These forms can be found in the architectural and stereotomic treatises that were widespread at the time. By comparing the vault geometry of the six churches with each other and with the geometric concepts discussed in the treatises, general statements can be made about the architect's design choices. On the basis of this investigation, hypotheses are made about the design and underlying geometric ideas of the vaults of Dientzenhofer's 'radical group', and the results are placed in context.}, language = {en} } @misc{SchmittWendland, author = {Schmitt, Rebecca Erika and Wendland, David}, title = {The geometric design of the "Guarinesque" vaults in Banz and Vierzehnheiligen in relation to the treatises of stereotomy}, series = {History of construction cultures : proceedings of the 7th International Congress on Construction History (7ICCH 2021), July 12-16, 2021, Lisbon, Portugal. Volume 2}, journal = {History of construction cultures : proceedings of the 7th International Congress on Construction History (7ICCH 2021), July 12-16, 2021, Lisbon, Portugal. Volume 2}, editor = {Mascarenhas-Mateus, Jo{\~a}o and Paula Pires, Ana}, publisher = {CRC Press}, address = {Boca Raton}, isbn = {978-1-00-317343-4}, doi = {10.1201/9781003173434-160}, pages = {371 -- 378}, abstract = {Johann Dientzenhofer's Banz Abbey Church (1710-1718) and Balthasar Neumann's church of Vierzehnheiligen (1743-1772), both located in Upper Franconia (Germany), are characterised by their masonry vaults, sequences of oval domes separated by double-curved arches. This Late Baroque architecture has been called "Guarinesque"; however, the conceptual connection between the vaults and Guarino Guarini's architecture remains to be thoroughly investigated. This paper resumes the discussion about the geometric definitions of these vaults using the modern methods of geometric analysis and reverse geometrical engineering, based on 3D laser scanning. The analysis of these scans reveals a design process based on plane circle segments and ovals, while more complex geometric procedures are not necessary to describe the vaults. Further, the relationship between these designs and the procedures of geometric design described in the treatises of stereotomy since the 16th century can be shown. On this background, the relation to Guarini's Architettura Civile (1737) is discussed.}, language = {en} }