Sultan Mehmed IV reigned for 39 years. The empire had reached its largest territories. Many monuments were erected in this period. Yeni Mosque and its complex began to be built 60 years ago, was completed. Between 1658-60 the fortress of Roumelia and Anatolia were repaired. The Egypt Market in Istanbul, the Palace of Hunkar, Koprulu builging complex, Safranbolu Koprulu Mehmet Pasha Mosque were built.