Seraglio), the capital of Bosnia, situated on the Miljacka, a small right-hand tributary of the Bosna and on the railway from Bosna-Brod, 167 m.
It is joined by four main tributaries, the Drina, Bosna, Vrbas and Una.
The Bosna issues from many springs near Serajevo, and winds for 107 m.
Near Doboj, on the Bosna, there is a state sugar-refinery, for which beetroot is largely grown in the vicinity.
A school of agriculture and dairy farming at Ilidze; and another school at Modric, near the mouth of the Bosna, where a certain number of village schoolmasters are annually trained, for six weeks, in practical husbandry.
The other, a narrowgauge line, crosses the Save at Bosna Brod, and follows the Bosna to Serajevo, throwing out branches eastward beyond Dolnja Tuzla, and westward to Jajce and Bugojno.
Small steamers ply on the Drina, Save and Una, but the Bosna, though broad from its very source, is, like the Vrbas, too full of shallows to be utilized; while the Narenta only begins to be navigable when it enters Dalmatia.
The later middle ages are represented by several monasteries, and many castles, such as those of Dervent, Doboj, Maglaj, Zepee and Vranduk, on the Bosna; Bihac, on Owing to the scarcity of authoritative documents, it is impossible to describe in detail the events of the next three centuries.
During this period Bosnia became the generally accepted name for the valley of the Bosna (ancient Basanius); and subsequently for several outlying and tributary principalities, notably those of Soli, afterwards Tuzla; Usora, along the south-eastern bank of the Save; Donji Kraj, the later Krajina, Kraina or Turkish Croatia, in the north-west; and Rama, the modern district of Livno.