What is "stecak"

Stećak (; plural: Stećci ) is the name for monumental medieval tombstones that lie scattered across Bosnia and Herzegovina, and the border parts of Croatia, Montenegro and Serbia, although almost exclusively following the borders of the medieval Bosnian Kingdom. An estimated 60,000 are found within the borders of modern Bosnia and Herzegovina and the rest of 10,000 are found in what are today Croatia (4,400), Montenegro (3,500), and Serbia (4,100), at more than 3,300 odd sites with over 90% in poor condition.

Appearing in the mid 12th century, with the first phase in the 13th century, the tombstones reached their peak in the 14th and 15th century, before disappearing during the Ottoman occupation in the very early 16th century. They were a common tradition amongst Bosnian Church, Catholic / Orthodox Church but some argue the Bosnian Bogumil's followers alike. By the scholars are mostly related to the autochthonous Vlachian population. The epitaphs on them are mostly written in extinct Bosnian Cyrillic alphabet. The one of largest collection of these tombstones is named Radimlja, west of Stolac in Bosnia and Herzegovina.

Stećaks was inscribed as a UNESCO World Heritage Site in 2016. It includes 30 necropolis – of which 22 from Bosnia and Herzegovina, 2 from Croatia, 3 from Montenegro, and 3 from Serbia.