1970
Tomasz Sikorski takes part in the work of the Warsaw Autumn Repertoire Committee.
2 September
Music to the ballet La escala de Jacob (Jacob’s Ladder) is premiered in Buenos Aires.
20 September
Homophony is premiered at the Warsaw Autumn by the Polish Radio and Television Symphony Orchestra conducted by Eleazar de Carvalho.
1971
Tomasz Sikorski marries Natalia Rosiewicz.
The composer continues his work for the Warsaw Autumn Repertoire Committee.
18 September
Premiere of Vox humana (Voix humaine) for mixed choir, 2 concertante pianos, 12 brass instruments, 4 gongs and 4 tam-tams at a Warsaw Autumn concert.
1972
Tomasz and his wife Natalia Sikorska (née Rosiewicz) divorce.
The composer chairs meetings of the Warsaw Autumn Repertoire Committee.
4 March
Tomasz Sikorski dedicates his Monodia e Sequenza to his father. The dedication reads as follows: ‘To my dear Kabaś on his name day.’
24 September
The National Philharmonic Orchestra conducted by Andrzej Markowski premieres Holzwege.
30 November
Andrzej Wojakowski and the composer premiere Monodia e Sequenza for flute and piano.
1973
Tomasz Sikorski chairs meetings of the Warsaw Autumn Repertoire Committee.
15 March
In Belgrade the Warsztat Muzyczny ensemble performs Without a Title for the first time.
June
Sikorski’s radio opera The Adventures of Sinbad the Sailor is recorded by the Polish Radio.
8 August
Jean-Pierre Armengaud and the composer premiere Listening Music for two pianos in the French town of Saint Maximin.
9 September
Diaphony and Listening Music are performed for the first time in Poland at the 11th Music Festival in Bydgoszcz.
27 September
Without a Title has its Polish premiere during a Warsztat Muzyczny concert at the Warsaw Autumn.
5 November
Following a decision of the Minister of Culture and Art, Tomasz Sikorski becomes entitled to additional living area.
1974
January
Sikorski’s radio opera The Adventures of Sinbad the Sailor is played for the first time at the Contemporary Polish Music Festival in Wrocław.
For the third time Tomasz Sikorski is chair of the Warsaw Autumn Repertoire Committee. However, he ends his work for the Committee that year.
19 September
The Polish Radio and Television Choir and Orchestra in Kraków conducted by Giampiero Taverna take part in the premiere of Music from Afar during the Warsaw Autumn Festival.
1975
Tomasz Sikorski receives a year-long scholarship under the Senior Fulbright Program and leaves for New York. At Princeton Electronic Music Center, Columbia, he produces Solitude of Sounds for tape.
20 September
Other Voices is premiered during the Warsaw Autumn. Instrumentalists from the National Philharmonic Orchestra are conducted by Wojciech Michniewski.
1976
13 March
Solitude of Sounds is played for the first time at Florida State University, Tallahassee.
25 September
Sikorski’s Solitude of Sounds is presented in Poland for the first time at the Warsaw Autumn Festival.
Polish Television premieres Sikorski’s music to the ballet A Traveller in the Belly of the Stars.
1977
24 September
Premiere of Sickness unto Death at the Warsaw Autumn, featuring Zbigniew Zapasiewicz and the composer.
1978
23 September
The Scottish National Orchestra from Glasgow conducted by Andrzej Markowski, with the composer as the soloist, premieres Music in Twilight for piano and orchestra.
1979
10 September
The Housing Department of the Warsaw District of Śródmieście orders Tomasz Sikorski to leave his flat at ul. Polna 40 and move to one three times as small at Pl. Konstytucji 2.
17 November
Hymnos is premiered in Sabae, Japan, by Aki Takahashi, to whom Sikorski dedicated his work.
Tomasz Sikorski’s works are performed at the ISCM Festival in Athens.