Time of the political independence of the Middle Ages Bosnia is directly connected to Zenica, before all with Gradješa's plate and act of abjuration, by which Kulin ban's time was continued and it denotes facts of political power, too. Near the fortified city of Vranduk, the seat of Bosnian kings, Janjići and homes of the bishops of the Bosnian Church, with stećci in Puhovac and Pojske, several scribes and builders – among other – are the facts and proofs of a special significance of this place in the Middle Ages. Also with its names (Bistua Nuova, Bilino polje, Brod) – and Zenica after March 1436, this city is tied for central part of the country and river Bosna.