YENİ CAMİİ (NEW MOSQUE) or VALIDE SULTAN CAMİİ (QUEEN MOTHER MOSQUE). Situated in Eminonu Istanbul. The construction began in 1597. It was ordered by Valide Sultan SAFIYE (Queen Mother) of Sultan Mehmed III. The original architect was Davut Agha, an apprentice to the great Architect Sinan. Davut Agha died in 1599 and was replaced by Ahmed Çavush. The construction took more than half a century and was completed by another Valide Sultan, Sultana Turhan Hatice, mother of Sultan Mehmed IV.