Several hundred people joined a march for traditional family values through the centre of Prague on Saturday afternoon.
Its participants, among them politician and church dignitaries, protested against the idea of the state recognizing a family other than the traditional man and woman model.
The event, organized by Alliance for Family comes ahead of a debate in Parliament on a bill on marriage equality, which would give gays and lesbians the same rights as heterosexuals.
100,000 have signed a petition against it.
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