The eHeritage online application (ISeD) enables maintenance and use of the Register of Immovable Cultural Heritage (eRNPD module) and the Register of Intangible Cultural Heritage (eRNSD module), establishment and maintenance of the system of Heritage Protection Areas (eVOD module) and effective monitoring and supervision of archaeological fieldwork research (eArchaeology module). The ISeD application supports all phases of the above-mentioned heritage protection processes and all involved stakeholders: the Ministry of Culture, the competent organisations for the protection of cultural heritage, the state and private archaeological research providers, the regional museums, and citizens. The publicly accessible parts of the ISeD application allow citizens to engage in the cultural heritage protection system. On the My eHeritage portal, citizens can submit initiatives for entry in the Register of Cultural Heritage, applications for cultural heritage consents for the investigation and removal of archaeological remains and participate in e-public consultation on the definition of protection regimes for cultural heritage. All relevant and up-to-date spatial and attribute data from ISeD is published on GIS public portal as open data. The application operates on the Slovenian State Cloud infrastructure and uses central building blocks (SI-PASS, GeoHub-SI and Geospatial Web Services, TRAY etc.). The ISeD application has been developed in the framework of the project "Integrated Information Support for the Protection of Cultural Heritage" and has been in use since September 2022.