## 1 Introduction
The building consisted only of stone walls; there were no windows, doors or other decorated architectural style. The Batawa project (Toronto, ON, Canada) [11] was very large project covering 600 hectares of an old manufacturing city with many buildings and the result provides a digital BIM archive of that area. Source data were drawings and paper copies of hand-drawn and computer-generated plans and documents with a black line, paper, digitized photographs (some from 1939) and digital and paper texts. Furthermore, TLS was used and a topographic study was created in AutoCAD Civil 3D. Other applications used in the project were SketchUp and Navisworks. The final BIM model was created in Autodesk Revit. Data for the case study of the historical building Kursunlu Khan in Turkey [12] were photographs, textual data on architectural and spatial characteristics, and 2D digital drawings and alterations created during construction and reconstructions. Another source was point clouds from TLS. The tool for 2D drafting was AutoCAD 2011, while for BIM modeling it was Revit Architecture 2013. The authors of [13], who used the Mobile Mapping System to document cultural heritage, revealed that despite its great potential, human intervention is still needed to achieve the desired results, with technical and methodological limitations causing skepticism about the mobile mapping system for three-dimensional surveys. Digital 3D modeling and visualization technologies have been widely used for more than 30 years. Despite the enormous efforts made to establish information technologies and especially 3D technologies for digital 3D modeling and visualization, the current situation is still ambiguous and the knowledge and skills in practice concerning 3D technologies pose a major challenge [14; 15]. Since literary sources do not clearly identify exact reverse engineering [16; 17] methods recommended for the creation of a 3D model of cultural heritage, it is necessary to consider the utilization of several methods in a specific case study. This paper demonstrates the potential of reverse engineering methods such as terrestrial laser scanning (TLS), terrestrial (ground) (DSLR), aerial (UAV) photogrammetry, BIM, as-built documentation for cultural heritage conservation, and scientifically examines the impact and assessment of these modern technologies' benefits throughout the process. This is important, since the combination of these technologies can contribute to saving time, maintaining security and providing high-precision digital archiving. The advantages are explored over traditional ways of preserving cultural heritage. There may be limitations in both methods of data acquisition, so space and lighting conditions need to be considered. For photogrammetry, it is necessary to consider a sufficient degree of overlap to avoid deformation of the corners of the object. With TLS, it is important to optimize the number of scan positions to avoid unnecessary extension of the registration process of scans in the postprocessing phase and thus the achievement of an excessively dense point cloud. The aim of this article was to examine currently used technologies and their role in the digitization workflow, and present a detailed historical building information model (HBIM) developed during the digitization project at the historic Kunerad Mansion (Slovakia). This work is organized as follows: in Section 2, the subject of the case study and scientific problem are discussed. Then, in Section 3, the used methodology is presented, detailing three methods. TLS is described in Section 4, including the knowledge base, planning and realization phases. Section 5 deals similarly with photogrammetry, including ground and aerial data processing. In Section 6 follows data integration from TLS and both photogrammetry methods. The BIM is described in Section 7 with the resulting 3D model and as-built documentation. Finally, we draw conclusions in Section 8.