Harry took an apprenticeship in his father’s church decoration & stained glass business where he learned about many styles of art. He also attended evening classes in Dublin’s Metropolitan College of Art and Design.
Harry travelled Europe and visited many of the great cathedrals to see their beautiful stained glass windows and he created over 130 stained glass windows himself.
There are Harry Clarke windows in Co Wicklow too.
The nearest to us (as far as I know to date ie: Dec 2020), are in St Brigid’s Church, "Enerily and Kilbride”, near Arklow.
Here is one of those windows:
(from Bewley’s Café Facebook page)