Editing Leoš Janáček (section)

=== 1916–1928: Breakthrough and masterworks ===
In 1916, he started a long professional and personal relationship with theatre critic, dramatist and translator [[Max Brod]].{{sfn|Drlíková|2004|p=83}}<ref>C Susskind, ''Janáček and Brod''. Yale University Press, 1985, {{ISBN|0-300-03420-2}}</ref> In the same year, ''Jenůfa'', revised by Kovařovic, was finally accepted by the National Theatre. Its performance in Prague in 1916 was a great success, and brought Janáček his first acclaim.<ref>{{cite AV media notes|last=Štědroň|first=Miloš|translator=Ted Whang|title=Jenůfa (Brno Janáček Opera Chorus and Orchestra, conductor [[František Jílek]])|others=Leoš Janáček|type=CD|publisher=[[Supraphon]]|id=SU 3869-2|location=Prague|year=2006}}</ref>{{sfn|Sehnal|Vysloužil|2001|pp=184, 185}}

[[Image:Kamila Stösslová in 1917.jpg|thumb|Kamila Stösslová with her son Otto in 1917]]
Following the Prague première, he began a relationship with singer Gabriela Horváthová, which led to his wife Zdenka's attempted suicide and their "informal" divorce.<ref name=PlumleyBio />{{sfn|Přibáňová|2007|p=8}} A year later (1917), he met [[Kamila Stösslová]], a young married woman 38 years his junior, who was to inspire him for the remaining years of his life. He conducted an obsessive and (on his side at least) passionate correspondence with her, of nearly 730 letters.{{sfn|Drlíková|2004|p=99}} From 1917 to 1919, deeply inspired by Stösslová, he composed ''[[The Diary of One Who Disappeared]]''. As he completed its final revision, he began his next 'Kamila' work, the opera ''[[Káťa Kabanová]]''.{{sfn|Tyrrell|2006–2007|loc=Vol. 2}}{{page needed|date=August 2023}}

In 1920, Janáček retired from his post as director of the [[Brno Conservatory]] but continued to teach until 1925.{{sfn|Drlíková|2004|p=91}} In 1921, he attended a lecture by the Indian philosopher-poet [[Rabindranath Tagore]] and used a Tagore poem as the basis for the chorus ''[[The Wandering Madman]]'' (1922).{{sfn|Simeone|Tyrrell|Němcová|1997|p=148}}  In the early 1920s, Janáček completed his opera ''[[The Cunning Little Vixen]]'', which had been inspired by a serialized novella by [[Rudolf Těsnohlídek]] in the newspaper [[Lidové noviny]].<ref>{{cite book |title=The Dictionary of the Opera |last=Osborne |first=Charles |page=[https://archive.org/details/dictionaryofoper00osbo/page/87 87] |year=1983 |publisher=Simon & Schuster |isbn=0-671-49218-7 |url=https://archive.org/details/dictionaryofoper00osbo/page/87 }}</ref>

In Janáček's 70th year (1924), his biography was published by Max Brod, and he was interviewed by [[Olin Downes]] for ''[[The New York Times]]''.{{sfn|Drlíková|2004|p=99}} In 1925, he retired from teaching but continued composing and was awarded the first honorary doctorate to be given by [[Masaryk University]] in Brno. In the spring of 1926, he created his [[Sinfonietta (Janáček)|Sinfonietta]], a monumental orchestral work, which rapidly gained wide critical acclaim. In the same year, he went to England at the invitation of [[Rosa Newmarch]]. A number of his works were performed in London, including his first string quartet, the wind sextet ''Youth'', and his violin sonata.{{sfn|Drlíková|2004|p=109}} Shortly after, and still in 1926, he started to compose a setting to an [[Old Church Slavonic]] text. The result was the large-scale orchestral ''[[Glagolitic Mass]]''.<ref name="glagolitic">{{cite web|title=''Mša glagolskaja''|url=http://www.leosjanacek.com/glagolitic.htm|website=leosjanacek.com|access-date=19 April 2012|archive-date=30 March 2012|archive-url=https://web.archive.org/web/20120330045329/http://www.leosjanacek.com/glagolitic.htm|url-status=dead}}</ref>

The world première of Janáček's lyrical [[Concertino (Janáček)|Concertino]] for piano, two violins, viola, clarinet, French horn and bassoon took place in [[Brno]] in 1926.<ref name="Grove-Janacek">{{Cite Grove |first=John |last=Tyrrell |title=Janáček, Leoš |id=14122 }}</ref> Around the same time, Janáček began work on a comparable chamber work for an even more unusual set of instruments, the [[Capriccio (Janáček)|Capriccio]] for piano left hand, flute, two trumpets, three trombones and tenor tuba, was written for pianist [[Otakar Hollmann]], who lost the use of his right hand during World War I. It premièred in Prague on 2 March 1928.{{sfn|Simeone|Tyrrell|Němcová|1997|pp=235–236}}

[[File:Leos Janacek hrob.jpg|thumb|upright|Janáček's grave, in [[Brno]]]]

In 1927 – the year of the Sinfonietta's first performances in New York, Berlin and Brno – he began to compose his final operatic work, ''[[From the House of the Dead]]'', the third act of which would be found on his desk after his death. In January 1928, he began his second string quartet, the ''[[String Quartet No. 2 (Janáček)|Intimate Letters]]'', his "manifesto on love". Meanwhile, the Sinfonietta was performed in London, Vienna and Dresden. In his later years, Janáček became an international celebrity. He became a member of the [[Akademie der Künste|Prussian Academy of Arts]] in Berlin in 1927, along with [[Arnold Schoenberg]] and [[Paul Hindemith]].{{sfn|Drlíková|2004|p=113}}{{sfn|Vysloužil|2001|p=227}}