Former Czechoslovak dissident and philosopher Radim Palous has died at the age of 90.
Palous was persecuted for his liberal political beliefs in the 1950s and again after the Soviet-led invasion of Czechoslovakia in 1968.
He was among the first signers of the Charter 77 human right statement and was active in the underground "samizdat" publishing movement during the communist era in Czechoslovakia.
He served as spokesman for the Charter 77 movement in 1982-83.
After the fall of communism in 1989, he became rector of Charles University in Prague.