When it opened in Cathays Park in 1912, the Glamorgan Building contained the administrative offices for the county of Glamorganshire. The name Glamorgan County Council is still inscribed over the door. After the thirteen Welsh counties were redefined in the mid-1970s, it was occupied by the Mid Glamorgan County Council until 1996. The following year, the former county hall became part of Cardiff University, an undergraduate and postgraduate research school founded in 1883. The Beau-Arts design by Vincent Harris features six fluted Corinthian columns plus pilasters and balusters.
