The article presents the 3D computer modelling of architectural details based on the modern BIM inventory systems. It discusses the methodology of architectural inventory, which employs laser measurements in the ArchiCad programme interconnected with the FlexiJet system. The use of this method allows one to create elements of a virtual building (BIM model) with great precision, thanks to its very high measurement accuracy and appropriate software. The application of this system is exemplified by the specified elevation detail of the Royal Palace in Łobzów, currently housing the Faculty of Architecture of Cracow University of Technology
