Karel Pravoslav Sádlo (5 September 1898 in Prague, Bohemia – 24 August 1971 in Prague, Czechoslovakia) was a Czech cellist and significant cello pedagogue.

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Karel Pravoslav Sádlo
A bust of Karel Pravoslav Sádlo, by Vlasta Prachatická (1960), his niece
Background information
Birth name	Karel Pravoslav Sádlo
Born	(1898-09-05)5 September 1898 Prague
Died	24 August 1971(1971-08-24) (aged 72) Prague, Czechoslovakia
Genres	Classical
Occupation(s)	Cellist, cello pedagogue
Instrument(s)	Cello
Years active	1920–1965
Relatives	Miloslav Sádlo, violist (brother) Vlasta Prachatická, portrait sculptor (niece)

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Between 1929–1961, he was the teacher of the majority of Czech cellists and tutored a large number of leading soloists and chamber music performers (e.g. Milos Sadlo, Josef Chuchro, František Smetana, František Sláma, Antonín Kohout). He was a teacher at the Conservatoire, dean of the Faculty of Music of the Academy of Performing Arts in Prague and a juror at prestigious performers' competitions.

His music publishing (Edition Sádlo, since 1928) as well as his new way of playing the cello (his book on cello technique was published in 1925) had a lasting influence on the development of modern Czech music.

Karel Pravoslav Sádlo was an active freemason. In 1937 he joined masonic lodge Bernard Bolzano in Prague, which was part of the National Czechoslovak Grand Lodge.^[1]