Prayers from the 11th century included:
ANGELE DEI,
qui custos es mei,
Me tibi commissum pietate superna;
(Hodie, Hac nocte) illumina, custodi, rege, et guberna.
Amen.
ANGEL OF GOD,
my guardian dear,
To whom his love commits me here;
Ever this (day, night) be at my side,
To light and guard, to rule and guide.
Amen.