sentences:  Over the crossing is a central tower, which was rebuilt in 1764 or 1767.John Robartes, 1st Earl of Radnor had a mausoleum added to the northwest corner of the north transept in 1764 or 1777.The building was restored in 1873 to the designs of George Edmund Street, who had the Radnor mausoleum Gothicised or rebuilt.