Luó Gōngyuǎn 羅公遠 (var. Luó Sīyuǎn 羅思遠; CBDB id 94077, lifedates not recorded) was a Táng-dynasty Daoist priest and magician of the early-eighth century, traditionally from Pózhōu 鄱州 (Jiāngxī). He is paired in TángSòng anecdotal literature with 葉法善 (Yè Fǎshàn) as a paradigmatic court-Daoist; the Míng huáng zálù 明皇雜錄 and the Tàipíng guǎngjì 太平廣記 (vol. 22 xiāndào 仙道; vol. 73, 77) preserve a rich set of legends about him, most famously the tale in which he conducts Táng Xuánzōng 唐玄宗 to the Moon Palace on the night of the Mid-Autumn Festival, where the emperor witnesses the Nǐcháng yǔyī qǔ 霓裳羽衣曲. The historical Luó is shadowy: he has no biography in the standard Tángshū, and CBDB has him without firm lifedates. He is credited in the alchemical literature, jointly with 葉法善, as a commentator on [[KR5a0228|DZ 227 Zhēn lónghǔ jiǔxiān jīng]] (an attribution that already in the Sòng was variant — Jùnzhāi dúshū zhì 郡齋讀書志 16.758–59 records the version with a third commentator, the Buddhist monk Yīxíng 一行 [682–727]; Tōngzhì 通志 Yìwén lüè 5.13b and Sòngshǐ 宋史 Yìwén zhì 205.5192 substitute Yè Jìngnéng 葉淨能 for 葉法善). The presence of Yīxíng’s name suggests an early Táng connection between this textual milieu and Tantric Buddhism (Mìzōng 密宗); but as with 陰長生 and 張果老, the xiān-attribution is in alchemy a standard legitimating device rather than a documented historical authorship.