Great Buildings Online: Sinan: Biography of the great Turkish architect (1489-1588) with examples of his work.
Newspot : Architect Sinan: Article on the works of this Turkish architect. Illustrations include a diagram of intertwined stairs designed by Sinan.
Turkey Ministry of Culture: Mimar Sinan: A biography of the architect best known for the Süleymaniye Mosque in Istanbul, inspired by the Hagia Sophia.
Wikipedia: Sinan: Biography from the collaborative encyclopedia of the Ottoman chief architect for sultans Selim I, Suleiman I, Selim II and Murad III.