Post-autonomy Serbia quietly expelled Muslims and restricted Jews by official edict.

Evidence

Muslims and Jews were slaughtered, expelled or forced to convert to Christianity. … Continued forced removal of non-Christians in Serbia took place more quietly in the decades that followed the establishment of Serbian autonomy in 1815–30. In the 1830s, Serbia’s Prince Miloš assisted the Ottomans in suppressing a Muslim revolt in neighbouring Bosnia, in return for which the Ottomans granted him several concessions: an Ottoman hatti serif (edict) of May 1833 ruled, among other things, that all Muslims in Serbia would be removed within five years, except those in the Ottoman fortress towns. Through various forms of persecution and harassment, Miloš succeeded in encouraging most of the Muslim landlords to leave Serbia. The Serbian capital of Belgrade had been largely Muslim before the nineteenth century, but following the establishment of the autonomous Serbian principality, the Muslim population was mostly expelled and most of its mosques were destroyed or dismantled. Similarly, although Miloš was relatively sympathetic to the Jews, his successors were less so, and the Jewish communities underwent restrictions they had not suffered in the Ottoman period, and were expelled or re-located from the towns outside Belgrade. — James Renton, Ben Gidley (eds.), Antisemitism and Islamophobia in Europe, 1035

Categorization

• QUESTION: Belgrade went from largely Muslim to Muslim-free in one generation — worth comparing to how quickly urban demography can flip under nationalist state-building.
• CANDY: Belgrade was a Muslim-majority city in 1800; today virtually no Muslims remain — a stark, tweetable demographic reversal.