Instrumental Duet,Piano Instrumental Duet,Piano,Viola,Violin - Level 4 - Digital Download SKU: A0.948813 By Ten Tenors. By Shannon Brown and Steven Edgar Baker. Arranged by arr. Adrian F. Pipas. Contemporary. Score and parts. 31 pages. Adrian F. Pipas #6661423. Published by Adrian F. Pipas (A0.948813). Au fond du temple saint (At the back of the holy temple) is a duet from Georges Bizet's 1863 opera Les pêcheurs de perles. The libretto was written by Eugène Cormon and Michel Carré. Generally known as The Pearl Fishers' Duet, it is one of the most popular numbers in Western opera – it appeared on seven of the Classic 100 Countdowns conducted by ABC Classic FM. It is sung by Nadir (tenor) and Zurga (baritone) in act 1.