Handel’s Theodora (1750, libretto Thomas Morell), an oratorio about a Christian martyr, does not have the religious-political import of his other English oratorios or the literary-critical stature of his English secular dramas and odes. A ‘sport’ among Handel’s oratorios, until recently Theodora resisted whole-hearted appreciation and elicited widely differing summaries of its meaning. This is the first extended study to be published since the chapter in Winton Dean’s Handel’s Dramatic Oratorios and Masques of 1959. Drawing on guidelines proposed in the appendix ‘Approaches to Oratorio’, the article examines the libretto’s sources, dramatization and relation to the librettist’s interests; positions the work with regard to the religious ideas of its time, identifying its religious-historical standpoint; and describes its kinship with contemporary drama, fiction and aesthetics. Connoisseurs among Handel’s audience appreciated Theodora but ‘the Town’ did not. It is suggested that both Morell and Handel were aiming for inclusiveness, comprehensiveness and breadth of appeal, and in so doing produced a work – more ambiguous and conspicuously open to interpretation than the biblical oratorios – that demands the listener’s active and discriminating engagement.