Bosnian archaeologist and historian of the Middle Ages, Pavao Anđelić, posited that Bosnia and Herzegovina is a home of great number of forts, fortresses, castles, including a number of walled city-fortresses, in various degrees of preservation, and built in different stages of Bosnian history. According to his research he argued that at least 350 of these edifices exists on the territory of modern-day Bosnia and Herzegovina,[1] most of which was erected by or belonged to a medieval Bosnian state, while small number in its borderlands simply rests on the territories included into modern state of Bosnia and Herzegovina, which was largely unchanged, with few very minor exceptions, since 1878. In his book, the Medieval Towns in Bosnia and Herzegovina, historian of architecture of the Middle Ages in Bosnia and Herzegovina, Husref Redžić, described 225 sites in manuscript and 147 in published book.[1]
Žuta Tabija (English: Yellow Bastion), built between 1727 and 1739, is an old fort overlooking the historic core of Sarajevo. It is a national monument of Bosnia and Herzegovina.
"Walled city of Vratnik" lies within wider eponymous Sarajevo neighborhood, fortified after brief 1697 terror-raid of Prince Eugene of Savoy. In 2005 it's designated national monument of BiH.