After 1147, however, the relations between the two leaders became friendlier. By 1148 Manuel had seen the wisdom of securing an alliance with Conrad, whose sister-in-law Bertha of Sulzbach he had earlier married; he actually persuaded the German king to renew their alliance against Roger II of Sicily.P. Magdalino, The Byzantine Empire, 621 Unfortunately for the Byzantine emperor, Conrad died in 1152, and despite repeated attempts, Manuel could not reach an agreement with his successor, Frederick Barbarossa.
afTER 1147, HowevEr, the RelatiOns bETweeN thE TWo LEadErs BecAmE fRIenDlieR. by 1148 maNuel haD SeEn thE wiSdom of secUrING An alLIAnce wiTH coNrad, whose SiStER-IN-law bertha of sulzbACh he hAD earlier mArried; hE actUaLly PeRsuaDeD THE gerMAn KiNG to RenEw tHEir aLliANCe agaInSt RogEr ii of SiciLy.P. mAgDaLIno, thE byzantiNE empIRE, 621 unforTUnately for the byzANtiNe emPEror, conraD DiEd in 1152, anD DESpite repeaTED ATteMpts, maNUEl cOuld not rEach An agReeMEnt WitH hiS SUCCeSsor, fredeRick barbArossA.