TransnationalCatholicisminTudorEnglanddetailstherelationshipbetweentransnationalmobilityandthedevelopmentofTudorCatholicism.AlmosttwohundredCatholicsfeltcompelledtoexilethemselvesfromEnglandratherthanconformwiththereligiousreformationsinauguratedbyHenryVIIIandEdwardVI.FrederickE.Smithexploreshowthese矇migr矇s’physicalmobilityreconfiguredtheirrelationshipswiththemenandwomentheyleftbehind,andhowitforcedthemtodevelopnewrelationshipswithindividualstheyencounteredabroad.Itanalyseshowtheexperiencesofmobilityanddisplacementcatalysedashiftintheirreligiousidentities,insomewaysbroadeningbutinothersnarrowingtheirunderstandingsofwhatitmeanttobe’Catholic’.Theauthorexaminestheroleofthese矇migr矇sasagentsofreligiousexchange,circulatingnewdoctrinalanddevotionalideasthroughoutwesternEuropeandforgingnewconnectionsbetweenthem.ByfocussingparticularlyuponthoseindividualswhosubsequentlyreturnedtotheirhomelandduringMaryI’sCatholiccounter-reformation,thestudyalsoexploresthelastinglegaciesofthese矇migr矇s’displacementandmobility,bothforthe矇migr矇sthemselvesastheygrappledwiththedifficultiesofre-integration,butalsoforthebroaderdevelopmentofEnglishCatholicism.Inthisway,TransnationalCatholicisminTudorEnglanddeepensourunderstandingofthecomplexandsometimescontradictorywaysinwhichexileshapesreligio-politicalidentities,butalsounderlinestheimportanceofinternationalmobilityasacrucialfactorinthedevelopmentofEnglishCatholicismandthewiderEuropeanCatholicChurchoverthemidsixteenthcentury.