Up to 20 mosques in Britain are opening their doors to the wider public.
The move is part of a national initiative to help bring greater understanding of Islam, and follows last month's Islamist terror attacks in France.
Britain has over 1,700 mosques, with most in England.
A number in London, Leeds, Leicester and a few other centres will be opening up and welcoming local visitors.
The BBC reports that community leaders from other faiths are also being invited to visit and mosque leaders and others in the Muslim community will be on hand to explain their beliefs and answer questions.
They want to dispel publicly-held beliefs about Islam and stress that Muslims are already very much part of British society.