including the possession and distribution of non-Muslim religious materials (such as the Bible), is illegal. Public worship by adherents of religions other than Islam is forbidden. On the inhabited islands, the mosque, forms the central place where Islam is practiced. Because Friday is the most important day for Muslims to attend the mosque, shops and offices in towns and villages close around 11 a.m., and the sermon begins by 12:35 p.m. The prayer call is performed by the (Muezzin). Most shops and offices close for fifteen minutes after each call. During the ninth Muslim month of Ramadan, cafés and restaurants are closed during the day, and working hours are limited. Mosques Most inhabited Maldivian islands have several mosques; Malé has more than thirty. Most traditional mosques are whitewashed buildings constructed of coral stone with corrugated iron or thatched roofs. In Malé, the Islamic Centre and the Grand Friday Mosque, built in 1984 with funding from the Persian Gulf states, Pakistan, Brunei, and Malaysia, are imposing, elegant structures. The gold-colored dome of this mosque is the first structure sighted when approaching Malé. In mid-1991 Maldives had a total of 724 mosques and 266 women's mosques. Radicalism The Guardian estimates that 50-100 fighters have joined ISIS and al-Qaeda from the Maldives. The Financial Times puts the number at 200. 2007 Malé bombing: On 29 September 2007 a homemade bomb went off in Sultan Park near the Islamic Centre in the Maldivian capital Malé, injuring 12 foreign tourists. In December, three men were sentenced to 15 years in jail after they confessed to the bombing. Two of those imprisoned, Mohamed Sobah and Ahmed Amin - both Maldivian natives in their early twenties-had their sentences changed from incarceration to three-year suspended sentences under observation and were later set free in August 2010. 2011 Ismail Khilath Rasheed controversy: In February 2012 almost all the Maldives National Museum's pre-Islamic artifacts, dating back to before the 12th century, were destroyed during an attack: "Some of the pieces can be put together but mostly they are made of sandstone, coral and limestone, and they are reduced to powder." He said the museum had "nothing [left] to show" of the country's pre-Islamic history. Among the damaged objects were a six-faced coral statue, an high bust of Buddha, as well as assorted limestone and coral statues Religious Stand of Maldives and Public Etiquette In 2008 after the ratification of the