In the 17th century, the Habsburg duchy of Carniola was internally divided into three administrative districts. This division was thoroughly described by the scholar Johann Weikhard von Valvasor in his 1689 work The Glory of the Duchy of Carniola. The districts were known in German as Kreise (kresija in old Slovene). They were: Upper Carniola with its centre in Ljubljana (formerly Kranj), comprising the northern areas of the duchy; Inner Carniola comprising the southwest, with its centre in Postojna, and Lower Carniola in the southeast, roughly corresponding to the medieval Windic March of the Holy Roman Empire. While the bulk of the population spoke Slovene, the German-speaking exclave of the Gottschee Germans existed around Kočevje in the south.
This division remained, in various arrangements, up to the 1860s, when the old administrative districts were abolished and Lower Carniola was subdivided into the smaller Bezirke of Novo Mesto (Rudolfswert), Kočevje (Gottschee), and Krško (Gurkfeld). Nevertheless, the regional identity remained strong also thereafter. Upon the dissolution of Austria-Hungary after World War I, Carniola was incorporated first into the State of Slovenes, Croats and Serbs and then into the Kingdom of Serbs, Croats and Slovenes and it ceased to exist as a separate political and geographical unit. The Carniolan regional identity soon faded away, but the regional identification with its sub-units (Upper Carniola, Lower Carniola, and, to a lesser extent, Inner Carniola) remain strong.
People of Lower Carniola speak various dialects with common characteristics, grouped together under the Lower Carniolan dialect group.
In the 16th century, the Lower Carniolan reformer and writer of the first Slovene book, Primož Trubar, laid the foundation for what later became standard Slovene, giving it additions of his native speech, the Lower Carniolan dialect, combined with the capital Ljubljana's dialect.
Music
Folklore
Lower Carniola has had an important impact on Slovene folk music[citation needed], with many great local musicians, the most notable being Lojze Slak[citation needed].