Cultural heritage is the foundation of a country's culture. The importance of cultural heritage documentation is recognized, and there is a growing need to document and preserve them also digitally. In order to maintain preservation and restoration of certain sights, it is necessary to know all information of such objects. With the progress of modern technologies, there are increasing opportunities for the collection, processing and visualization of objects with national significance. LiDAR technology has emerged as one of the most efficient methods of collecting data nowadays. It offers a fast, high quality and accurate 3D model. LiDAR is a remote sensing method that uses light in the form of a pulsed laser to measure ranges to the Earth. Main aim of this paper is to show how, using this technology, data of objects with significance can be collected and stored in database. Study area is Petrovardin Fortress, which is located in Novi Sad, Autonomous Province of Vojvodina, Serbia. The present fortress was built by Austria from 1692 to 1780. It represents the biggest symbol of Novi Sad. The collected data were obtained in the form of a point cloud. Further processing of data brings a classified point cloud and 3D representation. The 3D vector data that was extracted are stored in 3DCityDB. CityGML is a common information model and XML-based encoding for the representation, storage, and exchange of virtual 3D city and landscape models. CityGML provides a standard model and mechanism for describing 3D objects with respect to their geometry, topology, semantics and appearance, and defines five different levels of detail. The results of this paper are in the LOD 2 level.