The Salve Regina is extremely old, an example of the Gregorian chant of the Middle Ages. It is commonly said after the completion of the rosary.
Featured here is an instrumental version of this lovely hymn.
Salve, Regina, Mater misericordiae,
vita, dulcedo, et spes nostra, salve.
ad te clamamus, exsules filii Hevae,
ad te suspiramus, gementes et flentes
in hac lacrimarum valle.
Eia, ergo, advocata nostra, illos tuos
misericordes oculos ad nos converte;
et Jesum, benedictum fructum ventris tui,
nobis post hoc exsilium ostende.
O clemens, O pia, O dulcis Virgo Maria.

Hail, holy Queen, Mother of Mercy,
our life, our sweetness and our hope.
To thee do we cry, poor banished children of Eve;
to thee do we send up our sighs,
mourning and weeping in this valley of tears.
Turn then, most gracious advocate,
thine eyes of mercy toward us;
and after this our exile,
show unto us the blessed fruit of thy womb, Jesus.
O clement, O loving, O sweet Virgin Mary.