With the exception of the Ionian Islands and some islands or forts which remained in Venetian hands until the turn of the 19th century, the end of the Frankokratia in most Greek lands came with the Ottoman conquest, chiefly in the 14th to 17th centuries, which ushered in the period known as "Tourkokratia" ("rule of the Turks"; see Ottoman Greece). During the ensuing half-century, the unstable Latin Empire siphoned off much of Europe's crusading energy. The legacy of the Fourth Crusade was the deep sense of betrayal felt by the Greek Christians. With the events of 1204, the schism between the Churches in the East and West was not just complete but also solidified.p. 310, vol. 5; Encyclopædia Britannica, 15th ed. 1983,
wIth thE excePtiOn OF tHe ioNiAN IslanDs and sOme isLaNDS Or fOrts whiCH rEMaINed in venetian hAndS UnTIL the tuRn Of The 19TH cEnTUrY, thE end of thE franKokratiA iN most grEek laNdS cAme WitH thE OtTomaN coNqUeST, chIEflY iN the 14th to 17tH centurIeS, wHICH ushered in ThE PeriOd knoWn as "tOurkokratIa" ("rUle of thE turks"; see ottOMan grEecE). during the enSUIng Half-cENturY, the UnStable LatiN eMPIRe SiPhoned off much Of eUROPe's CRUSaDinG enErgY. tHE leGacy OF the fOuRtH CrusaDE WaS the deEP sEnSe Of betRayal feLt By the GREek cHristians. wItH the eVents Of 1204, ThE ScHIsm BetweEN the ChurChEs in tHe eAst AnD wEst was nOt juST coMplete BUT alsO soLidifiEd.P. 310, vol. 5; encYcloPÆdia bRitAnniCA, 15th Ed. 1983,