By the time the Ulster-Scots arrived in Bangor, nothing survived of the Abbey except the old tower which has vestiges of the 15th century Augustinian monastery.  In the early 1600s, Sir James Hamilton, a Scotsman from Lanarkshire who later became Viscount Clandeboye, engaged one William Stennors, a master mason, to rebuild the ruined church.  

Stennors’ church was a plain rectangular structure.  The stones of the earlier 14th century church were doubtless used for the rebuilding and a few of these stones have been identified and preserved.