 The "diezmo" was greatly reduced during the "Trienio liberal" of 1821–1823 (a decree of 29 June 1821 cut it by half), but restored in full force by the absolutist government that followed.In 1837 the permanent Spanish "diezmo" was suppressed, although it was extended year by year in order to pay the costs of the First Carlist War.In 1841, the "diezmo" was abolished and a lesser tax to support religion and clergy was established.