Montenegrin Serbs (Serbian: Crnogorski Srbi/Црногорcки Cрби) or Serbs of Montenegro, compose the second largest ethnic group in Montenegro (28.7% of country's population), after the Montenegrins. In historiography, the Orthodox people of Montenegro were called Serbs. In the constitutions of the Principality of Montenegro and Kingdom of Montenegro, the Montenegrin people's ethnonym was Serbs.