I have a new traveling partner,that being the compositions of Arvo Part.

Te Deum, also sometimes called the Ambrosian Hymn because of its association with St. Ambrose, is a traditional hymn of joy and thanksgiving. First attributed to Sts. Ambrose, Augustine, or Hilary, it is now accredited to Nicetas, Bishop of Remesiana; (4th century). It is used at the conclusion of the Office of the Readings for the Liturgy of the Hours on Sundays outside Lent, daily during the Octaves of Christmas and Easter, and on Solemnities and Feast Days. The petitions at the end were added at a later time and are optional. A partial indulgence is granted to the faithful who recite it in thanksgiving and a plenary indulgence is granted if the hymn is recited publicly on the last day of the year.  –EWTN website.