Blue Mosque, as it is popularly known, was constructed between 1609 and 1616 during the rule of Ahmed I. Its Külliye contains Ahmed’s tomb, a madrasah and a hospice. Magnificent hand-painted blue tiles adorn the mosque’s interior walls, and at night the mosque is bathed in blue as lights frame the mosque’s five main domes, six minarets and eight secondary domes.
After the conquest of Istanbul by Mehmed the Conqueror at 1453, construction of the Topkapı Palace was started at the year 1460 and completed at 1478 . Palace was built upon a 700.000 squaremeters area on an Eastern Roman Acropolis located at the Istanbul Peninsula between Sea of Marmara, Bosphorus and the Golden Horn. Topkapı Palace, was the administrative, educational and art center of the Empire for nearly four hundred years since Mehmed the Conqueror until Sultan Abdulmecid who is the thirty-first Sultan. Although Palace was abandoned by the Ottoman Dynasty by moving to the Dolmabahçe Palace at middle 19th century, Topkapı Palace was protected its importance everytime.
The Basilica Cistern (Cistern Sinking Into Ground”), is the largest of several hundred ancient cisterns that lie beneath the city of Istanbul.The cistern, located 500 feet (150 m) southwest of the Hagia Sophia on the historical peninsula of Sarayburnu, was built in the 6th century during the reign of Byzantine Emperor Justinian I.