Dr. Ramin Mehmanparast, Spokesman of the Ministry of Foreign Affairs of the Islamic Republic of Iran and his accompanying delegation today visited the Royal Opera House (ROH) Muscat. He was briefed on the house, its shows and programmes during the year. He also viewed the latest equipment used in music shows. He signed the visitors\' book, expressing his delight of visiting ROH Muscat, which is one of the world prestigious opera houses.