The main concert hall is the late-15th century church of the Assumption of the Virgin Mary (the former cathedral of Osor), while other concert spaces are used, such as the main square in Osor and archeological site of St Peter church.
For their outstanding contribution in the field of classical music in Croatia, the festival was declared national in 2011.
The top notch musicians over the last several years include L'Arpeggiata and Christina Pluhar, Giovanni Sollima, Diana Haller, Renata Pokupić, Aleksandar Marković among others.
[6] The first integral performance at the 37th Osor Musical evenings was recorded by Croatian Radiotelevision and was published as a triple DVD in 2013.
[7] First three decades of festival are well documented in a book by Dodi Komanov, Arkadija hrvatske glazbe: 30 godina festivala Osorske glazbene večeri (Arcady of Croatian music: 30 years of Osor Musical Evenings) published by the festival in 2006.