She finally entered the hall of music (reached the pinnacle of music).
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usage
The figurative use of 殿堂 is very popular: 艺术殿堂 (hall of art), 学术殿堂 (hall of academia), 音乐殿堂 (hall of music). It means the highest, most prestigious level of a field — equivalent to 'the pantheon of' in English.
