Bulgaria's oldest and most prestigious theatre, built in 1904 in a stunning neo-classical style. Named after the great Bulgarian writer Ivan Vazov, the building itself is a masterpiece with its columned portico, ornate interior, and the beautiful City Garden in front. Even if you don't catch a performance, the exterior and garden are worth visiting.
The City Garden in front is lovely for photos. Check for performances with English subtitles. The building is especially beautiful when lit at night.