ile ▁would ▁just ▁be ▁for ▁a ▁few ▁months , ▁thanks ▁to ▁the ▁family ▁connections ▁of ▁Duch ess ▁Ag nes ; ▁however , ▁their ▁hurried ▁and ▁ins u fficient ly ▁prepared ▁expedition ▁failed ▁to ▁cross ▁the ▁O der ▁River , ▁and ▁ultimately ▁failed ▁because ▁of ▁strong ▁opposition ▁from ▁W ład ys ław ▁II ' s ▁former ▁subjects ▁and ▁problems ▁Con rad ▁III ▁had ▁within ▁Germany ▁as ▁a ▁result ▁of ▁his ▁extended ▁travel s . ▁The ▁king ▁gave ▁W ład ys ław ▁II ▁and ▁his ▁family ▁the ▁town ▁of ▁Al ten burg ▁in ▁Sax ony . ▁This ▁was ▁intended ▁as ▁a ▁temporary ▁residence , ▁but ▁W ład ys ław ▁II ▁would ▁spend ▁the ▁rest ▁of ▁his ▁life ▁there . ▁ ▁T ired ▁of ▁a ▁ted ious ▁life ▁in ▁Al ten burg , ▁B oles ław ▁tra ve led ▁to ▁the ▁court ▁of ▁his ▁prote ctor , ▁King ▁Con rad ▁III . ▁With ▁him , ▁the ▁young ▁Polish ▁prince ▁extens ively ▁took ▁part ▁in ▁German ▁political ▁affairs . ▁In ▁ 1 1 4 8 ▁he ▁joined ▁in ▁the ▁Second ▁Cr us ade ▁with ▁Con rad ▁III , ▁during ▁which ▁he ▁visited ▁Constantin ople ▁and ▁the ▁Holy ▁Land . ▁Con rad ▁III ▁died ▁in ▁ 1 1 5 2 ▁without ▁having ▁secured ▁the ▁return ▁of ▁W ład ys ław ▁II ▁to ▁Poland . ▁His ▁successor ▁was ▁his ▁ener get ic ▁nep hew ▁Frederick ▁Bar bar ossa , ▁whose ▁service ▁B oles ław ▁almost ▁immediately ▁joined . ▁The ▁first ▁action ▁of ▁the ▁new ▁German ▁r uler , ▁however