u ▁with ▁concrete ▁and ▁provided ▁better ▁inf antry ▁sh el ters . ▁As ▁an ▁early ▁fort , ▁Que ule u ▁has ▁relatively ▁few ▁under ground ▁pass ages ▁compared ▁to ▁the ▁Mos el stellung ▁for ts ▁of ▁the ▁ 1 8 9 0 s , ▁but ▁does ▁feature ▁counter mine ▁pass ages ▁extending ▁from ▁the ▁front ▁of ▁the ▁fort . ▁ ▁History ▁While ▁the ▁Mos elle ▁valley ▁was ▁under ▁German ▁control ▁during ▁World ▁War ▁II ▁the ▁fort ▁was ▁used ▁starting ▁in ▁ 1 9 4 3 ▁by ▁the ▁German ▁occup iers ▁as ▁an ▁intern ment ▁camp ▁( S ▁Son der l ager ) ▁for ▁members ▁of ▁the ▁French ▁Res istance , ▁including ▁Joseph ▁Der han . ▁The ▁ ▁fort ▁was ▁called ▁the ▁" H ell ▁of ▁Que ule u " ▁( En fer ▁de ▁Que ule u ). ▁It ▁was ▁not ▁a ▁concentration ▁camp , ▁but ▁an ▁inter rog ation ▁center ▁for ▁captured ▁or ▁arrested ▁members ▁of ▁the ▁Res istance , ▁commanded ▁by ▁Schutz st aff el ▁Haupt sch ar führ er ▁Georg ▁Friedrich ▁Hem pen ▁(* ▁ 2 7 . 0 7 . 1 9 0 5 ). ▁Between ▁ 1 5 0 0 ▁and ▁ 1 8 0 0 ▁people ▁were ▁det ained ▁at ▁Que ule u . ▁ ▁Pr ison ers ▁were ▁held ▁in ▁Cas em ate ▁A ▁of ▁the ▁fort . ▁Th irty - six ▁died ▁there ▁and ▁four ▁escaped ▁through ▁a ▁vent ilation ▁sh aft . ▁Among ▁the ▁most ▁notable ▁prisoners ▁were ▁the ▁Mario ▁Group ▁of ▁res ister s