The Celtic wall cross features the following Irish blessing:
Irish House Blessing
Bless the four corners of this house
And be the lintel blest,
And bless the hearth, and bless the board,
And bless each place of rest.
And bless each door that opens wide
To stranger as to kin,
And bless each crystal windowpane
That lets the starlight in.
And bless the roof tree overhead,
And every sturdy wall.
The peace of man, the peace of God,
The peace of love on all.
