In task 5.7 (Open Linked Data. Archaeology Case Study), a virtual reconstruction of the Roman theatre in Catania has been created as an example of a transition of archaeological data to the cloud, i.e., from data silos on individual computers to webservices. The case study is based on a unified workflow that starts with the archaeological documentation and results in a virtual reconstruction. The data was processed in the Extended Matrix (EM) system that has been developed by the ITABC. The workflow is accompanied by a Linked Open Data scenario that connects the 3D data with systems for authority data such as gazetteers for place information and ChronOntology for temporal information. Here we report on the CIDOC CRM mapping of the work in task 5.7, namely the mapping of LOD scenario and the Extended Matrix of the Roman theatre in Catania as well as their alignment.