The multi-stage transmission comprises four planetary gear sets, eight rotatable shafts and six shift elements. Sun of first set is connected to fifth shaft which is couplable, via third brake, to housing. Drive shaft is connectable, via first clutch, to fourth shaft connected to ring of first set and carrier of second set and which is couplable, via second brake, to housing. Drive shaft is connectable, via second clutch, to seventh shaft connected to carrier of fourth set and ring of third set and is connectable, via third clutch, to eighth shaft connected to sun of second set. Sixth shaft is connected to carrier of first set, ring of second set and ring of fourth set. Third shaft is connected to sun of third set and sun of fourth set and is couplable, via first brake, to housing. Drive shaft is connected to carrier of third set.