Reinhold Moritzevich Glière (Ukrainian language: Ре́йнгольд Мо́ріцевич Гліер / Reingol'd Moritsevich Glier; born Reinhold Ernest Glier, which was later converted for standardization purposes; 11 January 1875 [O.S. 30 December 1874] – 23 June 1956) was a Russian/Soviet composer of German-Polish ancestry.
Glière was born in Kiev. He was the second son of the wind instrument maker Ernst Moritz Glier (1834–1896) from Saxony (Klingenthal), who emigrated to the Russian Empire and married Józefa (Josephine) Korczak (1849–1935), the daughter of his master, from Warsaw. His original name, as given in his baptism certificate, was Reinhold Ernest Glier. About 1900 he changed the spelling and pronunciation of his surname to Glière, which gave rise to the legend, stated by Leonid Sabaneyev for the first time (1927), of his French or Belgian descent.
He entered the Kiev school of music in 1891, where he was taught violin by Otakar Ševčík, among others. In 1894 Glière entered the Moscow Conservatory where he studied with Sergei Taneyev (counterpoint), Mikhail Ippolitov-Ivanov (composition), Jan Hřímalý (violin; he dedicated his Octet for Strings, Op. 5, to Hřímalý), Anton Arensky and Georgi Conus (both harmony). He graduated in 1900, having composed a one-act opera Earth and Heaven (after Lord Byron) and received a gold medal in composition. In the following year Glière accepted a teaching post at the Moscow Gnesin School of Music. Taneyev found two private pupils for him in 1902: Nikolai Myaskovsky and the eleven-year-old Sergei Prokofiev, whom Glière taught on Prokofiev's parental estate Sontsovka. Glière studied conducting with Oskar Fried in Berlin from 1905 to 1908. One of his co-students was Serge Koussevitzky, who conducted the premiere of Glière's Symphony No. 2, Op. 25, on 23 January 1908 in Berlin. Back in Moscow, Glière returned again to the Gnesin School. In the following years Glière composed the symphonic poem Sireny, Op. 33 (1908), the programme symphony Ilya Muromets, Op. 42 (1911) and the ballet-pantomime Chrizis, Op. 65 (1912). In 1913 he gained an appointment to the school of music in Kiev, which was raised to the status of conservatory shortly after, as Kiev Conservatory. A year later he was appointed director. In Kiev he taught among others Levko (Lev) Revoutski, Borys Lyatoshynsky and Vladimir Dukelsky (who became well known in the West as Vernon Duke).