[2] George Boyle, 6th Earl of Glasgow, was benefactor of the cathedral and the associated theological college and commissioned William Butterfield to design the building.

Butterfield was one of the great architects of the Gothic revival and also designed St Ninian's Cathedral in Perth.

[4] In the entrance porch is an interesting collection of Celtic crosses, all of which were excavated on the island in Victorian times.

The stained glass is by William Wailes (west window) and Hardman & Co.[5] The organ is by Philip Wood of Huddersfield.

It was installed in 2004, having been relocated from Logie Pert Parish Church, and replacing an organ by John Compton.