The cube is topped by an ascending system of domes and semi-domes, culminating in the central dome, which is 33 meters in diameter and 43 meters high at its central point. The overall effect is one of perfect visual harmony, leading the eye up to the peak of the dome.
The Sultan Ahmed Mosque is the only mosque in Turkey that has six minarets. When the number of minarets was revealed, the Sultan was criticized for presumption, since this was, at the time, the same number as at the mosque of the Ka'aba in Mecca. He overcame this problem by paying for a seventh minaret at the Mecca mosque.
At its lower levels the interior of the mosque is lined with more than 20,000 handmade ceramic tiles, made at Iznik (the ancient Nicaea). Its upper levels are painted. More than 200 stained glass windows with intricate designs admit natural light, today assisted by chandeliers. On the chandeliers, ostrich eggs are found that were meant to avoid cobwebs inside the mosque by repelling spiders. The decorations include verses from the Qur'an, many of them made by Seyyid Kasim Gubari, regarded as the greatest calligrapher of his time. The floors are covered with carpets, which are donated by faithful people and are regularly replaced as they become worn out.
The most important element in the interior of the mosque is the mihrab, which is made of finely carved and sculptured marble, the adjacent walls sheathed in ceramic tiles. To the right of the mihrab is the minber, or pulpit, where the Imam stands when he is delivering his sermon at the time of noon prayer on Fridays or on holy days. The mosque has been designed so that even when it is at its most crowded, everyone in the mosque can see and hear the Imam.
Each of the minarets has three balconies, and until recently the muezzin or prayer-caller had to climb a narrow spiral staircase five times a day to announce the call to prayer. Today a public address system is used, and the call can be heard across the old part of the city, echoed by other mosques in the vicinity. Large crowds of both Turks and tourists gather at sunset in the park facing the mosque to hear the call to evening prayers, as the sun sets and the mosque is brilliantly illuminated by colored floodlights.