Blue Mosque or The Sultan Ahmed Mosque is an historic mosque in Istanbul. The mosque is popularly known as the Blue Mosque for the blue tiles adorning the walls of its interior. It was built during the rule of Ahmed I.
Ali Qapu - Music room - Isfahan - Iran Ālī Qāpū (Turkish for Sublime Gate; Persian: عالیقاپو) is a grand palace in Isfahan, Iran. In the sixth floor music room, deep circular niches are found in the walls providing acoustics with a phenomenal aesthetic.
Saint Petersburg Mosque, Russia - Quote:"The walls were made with grey granite and the dome and both minarets (tower) are covered with mosaic ceramics of sky-light-blue colour. Skilled craftsmen from Central Asia took part working on the mosque.