An Túr Gloine

An Túr Gloine (The Tower of Glass) was a cooperative studio for stained glass and opus sectile artists from 1903 until 1944, based in Dublin, Ireland.

Sources:
An_Túr_Gloine on Wikipedia
Gazetteer of Irish Stained glass, revised new edition, edited by Nicola Gordon-Bowe, David Caron & Michael Wynne (Irish Academic Press, 2021)