The Sultan Qaboos Mosque towers over the city center, welcoming thousands of worshippers for prayers each day since its completion in 2009. Inside, a crystal chandelier hangs from an intricately carved 36-meter (118-foot) dome, and a 20-ton handwoven carpet with 115 million individual knots covers the floor. Outside, the landscaped grounds provide a peaceful spot for rest. Non-Muslims can tour the interior Saturdays to Thursdays from 8:00 a.m. to 11:00 a.m.; visitors must dress modestly and women should cover their hair.