What are these Blue Tiles in Galway?
Recently I have started back with walking tours of Galway City, and one questions keeps popping up in the conversations around bowling green what is the meaning of the blue tiles where there are 3 houses with blue tiles from research there around 118 homes and buildings in Galway.

The lettering on the Galway tiles are YHS, confused many of its closeness to the religious monogram IHS for the name of Jesus.
I remember reading that the Poor Clare sisters here in Galway did extensive research to confirm that these tiles were places outside the doors of homes to protect the families. The Poor Clare sisters researched the tiles in 2014.
The tiles were introduced by a Franciscan Friar, Fr Francis Donnelly in January 1914, the blue YHS tiles, depict an abbreviation of the name of Jesus in Greek and they were places over the doors in order to invoke God’s blessings to the occupants.
Fr Donnelly was also minister in Limerick, Cork & Ennis Co Clare, where the blues tiles can be seen. When Fr Donnelly held his ministry in Ireland 1908 – 1929, at that time there was a lot unrest and division happening, (WW1 & 1916 recruitment and then war of independence).