Tiāntán shì Míng-Qīng liǎng dài huángdì jì tiān de dìfang.
The Temple of Heaven is where Ming and Qing emperors held sacrificial ceremonies.
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usage
坛 is used as a suffix meaning 'circle/world' for professional fields: 文坛 (literary world), 体坛 (sports world), 影坛 (film world), 歌坛 (music world), 论坛 (forum).