GeoGraph - photograph every grid square

Building in Swansea University

This is a building in the administrative quarter of the university - the old Singleton Abbey. This page Link suggests that it contains an older octagonal building called Marino, three sides of which are still visible on the exterior.
If this is a photo of Marino then the roof has been modified with extra windows and the corners of the octagon have had columns added. The different window heights and positions in the sections either side of the centre portion would seem to go along with the idea of an original building being extended.