All tourists in Istanbul need to see the grandiose Hagia Sophia. It was once the main cathedral of Byzantium, which the Ottomans rebuilt into a mosque. Another symbol of the city is the Blue Mosque. Inside it, you can see 20 thousand white and blue ceramic tiles. Admission is free. People go to Istanbul for Turkish sweets, leather, sheepskin coats, bed linen and quality clothing. A Turkish lamp made of multi-coloured mosaics can become a very beautiful and useful thing – they are inexpensive and are found everywhere.