<P> As one of their first acts after end of the War of the Castilian Succession in 1479 , Ferdinand II of Aragon and Isabella I of Castile established the centrally - organized and efficient Holy Brotherhood as a national police force . They adapted an existing brotherhood to the purpose of a general police acting under officials appointed by themselves , and endowed with great powers of summary jurisdiction even in capital cases . The original brotherhoods continued to serve as modest local police - units until their final suppression in 1835 . </P>
<P> As one of their first acts after end of the War of the Castilian Succession in 1479 , Ferdinand II of Aragon and Isabella I of Castile established the centrally - organized and efficient Holy Brotherhood as a national police force . They adapted an existing brotherhood to the purpose of a general police acting under officials appointed by themselves , and endowed with great powers of summary jurisdiction even in capital cases . The original brotherhoods continued to serve as modest local police - units until their final suppression in 1835 . </P>
who organized the first police department in history
who organized the first police department in history
Ferdinand II of Aragon Isabella I of Castile
Ferdinand II of Aragon Isabella I of Castile