Theo Loevendie was born on September 17th, 1930 in Amsterdam.
He studied composition and clarinet at the Amsterdam Conservatory.
Up to 1968 he dedicated himself almost exclusively to jazz and he performed with his own ensemble at the main European jazz festivals: Montreux, Juan-les-Pins, Nîmes, Warsaw, Molde (Norway) and Laren (Holland).
From 1970 to 1988, Loevendie has been a professor of composition at the Rotterdam Conservatory of Music, from 1988 to 1997 at the Royal Conservatory of Music in The Hague and since 1995 at the Sweelinck Conservatory of Music in Amsterdam. He was central composer at many festivals and he has given master classes all over the world.
In 1968, Loevendie began to focus on the composing of concert music. His compositions are frequently performed both at regular concerts and at festivals all over the world.
Loevendie has composed four operas: 'Naima' (1985), which was premiered at the 1985 Holland Festival in Amsterdam, the chamber opera 'Gassir, the Hero' (1990), premiered May 1991 in Boston (U.S.A.), 'Esmée', which was first performed in Amsterdam at the Holland Festival 1995 and in Berlin (1995) and had a staging again in 1997 at Bielefeld, Germany, and the chamber opera 'Johnny & Jones', performed at the Holland Festival 2001 and in 2003 in Dresden (Germany).
Among his orchestral compositions are a 'Piano concerto' (1996), a 'Violin concerto' (1998), a 'Clarinet Concerto' (2001) and 'Seyir' (2002) for 25 western and non-western instruments (premiered in the Berliner Festspiele 2002).
In 2003, Loevendie founded the ensemble Ziggurat, a combination of western and non-western instruments. Since then he wrote many compositions for this ensemble. On the 11th of October 2014, the opera ‘Spinoza’ premiered at the Grote Zaal of the Concertgebouw in Amsterdam.
For one of his jazz records he received an Edison in 1969. He was awarded the 1979 Wessel Ilcken Prize for all his jazz activities through the years.
The recording of 'De Nachtegaal' (The Nightingale) was awarded an Edison in 1982; a year later followed the prize of the RAI (Italian Television and Radio) for the television production of this work, which since then has been performed in many languages all over the world. In 1984, Loevendie shared with Pierre Boulez the American Koussevitzky International Record Award; he received the prize for 'Flexio' (1979), written on the occasion of the 90th anniversary of the Concertgebouw Orchestra. The opera 'Naima' (1985) was awarded with the Matthijs Vermeulen Prize 1986 of the City of Amsterdam. In 1988, Loevendie was the first composer to receive the prestigious 3M Music Award for his entire output and his great merits in musical life. In 2016, he received the Andreas Medal of Honour of The City of Ansterdam for his lifetime achievements.