France's particular brand of secularism, known as "laïcité", is considered a backbone of the French Republic. And yet this separation of church and state is a touchy subject and often misunderstood. Its backers say it's the glue that lets the French live together in harmony despite their differences, but critics say it's anti-religious and increasingly used to stigmatise Muslims. In this show, we explore the ins and outs of "laïcité" and why it continues to be so divisive, 120 years after it was signed into law.