Romanesque portal from Olbin - 3D digital recomposition

Abstract

The aim of the study was to define the original shape of the 12^th-century portal built into the wall of the Church of St. Mary Magdalene in Wrocław. The portal is a remnant of a priceless monument of Romanesque architecture in the region - the Benedictine Abbey in Olbin, which was demolished by order of the city council in 1529. The portal was subjected to very extensive alterations and conservation treatments, which strongly affected its form. Previous studies have linked two other stonework pieces to it - the tympanum and the archivolt, which were probably separated from the portal in 1529. An attempt at reconstruction was made using digital photogrammetric 3D models of the portal, tympanum and archivolt. The juxtaposition of these in 3D software, cutting the model into separate stonework elements, changing its layout and modelling of non-preserved parts allowed the development of three proposals for 3D the reconstruction of the 12^th-century portal.