Dataset related to the semantic annotation of the HBIM reconstruction of choir screen and ambo of Monreale Cathedral 12th c. The authors acknowledge the collaboration within the Monreale HBIM Project (project code BH-P-25-54), developed through a joint initiative between the Bibliotheca Hertziana – Max Planck Institute for Art History and associated research partners. The project’s historical and architectural research was conducted by Dr Elisabetta Scirocco and Prof. Ruggero Longo, whose studies provided the scientific foundation for the reconstruction and its documentation. The 3D model was created by Karol Argasiński (BIMfaktoria), while Dr Igor Bajena carried out the semantic 3D model annotations and enrichment.