PRAGUE, Jan 20 (Reuters) - A Czech man set himself on fire in Prague's Wenceslas Square on Sunday, just days after the anniversary of student Jan Palach's immolation in 1969 to protest at the occupation of Czechoslovakia, police said. A spokeswoman said the 36-year-old lit his jacket in front of the National Museum - an area usually teeming with tourists and locals alike - near where Palach doused himself with flammable liquid on Jan. 16, 1969, following the occupation of communist Czechoslovakia by Russian-led forces.