The Virtual Record Treasury of Ireland (VRTI) was established in 2016 as an initiative to reconstruct the Public Record Office of Ireland that was lost in the civil war fire in 1922. The initiative has become a nationwide effort to re-discover, digitize, reconstruct and catalogue the lost archives of the subsequent years. Leveraging information technologies, historians have constructed the one of the largest historical archives in Ireland, contributing to preserving the heritage of a nation. The VRTI has implemented a data-centric approach to exploiting the Knowledge Graphs (KG) capabilities for organizing, cataloguing and sharing knowledge across different resources. However, interacting with a KG requires the creation of complex and time-consuming queries which limits the uptake of the information. Therefore, it was decided to design an intuitive user interface to facilitate exploration of the Knowledge Graph for Irish History (KGIH). The KGIH is a five star linked open data resource, the first of this kind to exist for Irish historical research. The VRTI-KG explorer provides a straightforward method for casual users and researchers to interact with the KG and apply it in real-world use cases. This paper presents the uptake and impact of the explorer and outlines recent enhancements designed to provide historians with more control over the information presented on the interface.