Listen to Offertorium: Servus Tuus online. Offertorium: Servus Tuus is an English language song and is sung by Choir Of Cathedral Einsiedeln. Offertorium: Servus Tuus, from the album The Ultimate Christmas Collection, was released in the year 2015. The duration of the song is 2:15. Download English songs online from JioSaavn.