The Semantic Web is the new wave of developments on the World Wide Web pushed forward by millions of developers and heralded by the W3C\footnote{http://www.w3.org/}. These new standards aim to provide the web with semantics, so that automated programs can act on data the same way as persons do, together with the open data philosophy, that aims to liberate all kinds of data to the web for the benefit of mankind. On this frameset, we have developed two distinct tools that interact with the Pat.mapa cultural heritage ontology built by the Culture Department of the Generalitat de Catalunya. The Pat.Mapa Extract and Review tool extracts events from texts attached to this semantic database, and lets the end user review them before adding them; while the Pat.mapa Ontology Visualizer lets the end user interact with this semantic database in a intuitive way. We hope that these tools will help everyone on the migration to a semantic web, as we aim to generalise them to work with any semantic database.