Euxinograd

Euxinograd is a late 19th-century Bulgarian former royal summer palace and park on the Black Sea coast, 8 kilometres north of downtown Varna. The palace is currently a governmental and presidential retreat, hosting cabinet meetings in the summer and offering access for tourists to several villas and hotels. Since 2007, it is also the venue of the Operosa opera festival. Euxinograd is situated at an altitude of 49 m. The park and palace were closed until the summer of 2016 due to extensive renovations.

Source: Wikipedia