Oplen House is a traditional early 20th-century Bohinj farmhouse made of wood and stone, renovated in period style with authentic furnishings to serve as a museum of domestic culture of the people living in the valleys around Bohinj Lake. +
Although Orkestrada was formally established in 2010, it had actually been growing for some time before with Rada Kikelj Drašler writing poems that became the band's material for its lyrics. +
Established in 1989 in Zagorje ob Savi, the band Orlek is one of the longest standing rock bands in Slovenia, continuously performing, touring, and recording since its inception. +
Since 1995, Ormož Castle, first mentioned in 1278, has been a centre for contemporary cultural developments which houses the Franc Ksaver Meško Library, part of the administration of the Ormož unit of the Ptuj – Ormož Regional Museum. +
Established back in 1994 and continuously setting up regular live gigs and club nights ever since, Orto Bar is one of Ljubljana's central places for rock music enthusiasts. +
The Osum Association was established in 2003 by Matej Filipčič, who has made a name for himself as an architect, an actor (during the 1990s he acted in performances by Tomaž Štrucl and Barbara Novakovič) (Muzeum Institute), a dancer (Melancholic Thoughts by Fourklor), a stage designer (at Ljubljana City Theatre (MGL) and Slovene National Theatre Opera and Ballet Ljubljana) and a director of his own performances. +
Located on an island in the river Krka, seven kilometres east of Novo mesto, Otočec Castle was first mentioned in 1252 as a property of the Counts of Višnja gora. +
Otok Cultural Institute (otok meaning "island" in Slovenian) is a non-profit cultural organisation for the development of film culture that operates in Ljubljana and Izola. +
The Oton Župančič Library was established in 1981 with the amalgamation of three libraries: the City Library (established in 1911 as St Jacob Library by the Industry Society of St Jacob district), the Workers Library (established in 1926 by the Workers Chamber) and the Pionirska (Youth) Library (established in 1948). +
Dedicated to Slovene poet Oton Župančič (1878–1949), the Oton Župančič Memorial House, established in 1991, is a house erected on the site of Župančič former homestead (which burned down in 1888). +
OZOR Production Studio is an animation production company started in 2010 by award-winning comic-strip writer, animator, screenwriter and director Grega Mastnak, who studied painting at the Academy of Fine Arts and Design in Ljubljana and film animation at the legendary FAMU film and television school in Prague. +
The music festival O•zvočenje was founded in 2002 by the legendary Slovenian experimental group SAETA, a collective that's been exploring new musical terrains since 1977. +