Avlu), also known as the Imperial Sofa (Sofa-ı Hümâyûn), was more of an innermost private sanctuary of the sultan and his family, and consists of a number of pavilions, kiosks (köşk), gardens and terraces. It was originally a part of the Third Courtyard but recent scholars have identified it as more separate to better distinguish it. Circumcision Room In 1640, Sultan Ibrahim I added the Circumcision Room (Sünnet Odası), a summer kiosk (Yazlik Oda) dedicated to the circumcision of young princes, which is a religious tradition in Islam for cleanliness and purity. Its interior and exterior are decorated with a mixed collection of rare recycled tiles such as the blue tiles with flower motifs at the exterior. The most important of these are the blue and white tile panels influenced by far-eastern ceramics on the chamber facade, dated 1529. These once embellished ceremonial buildings of Sultan Suleiman I, such as the building of the Council Hall and the Inner Treasury (both in the Second Courtyard) and the Throne Room (in the Third Courtyard). They were moved here out of nostalgia and reverence for the golden age of his reign. These tiles then served as prototypes for the decoration of the Yerevan and Baghdad kiosks. The room itself is symmetrically proportioned and relatively spacious for the palace, with windows, each with a small fountain. The windows above contain some stained-glass panels. On the right side of the entrance stands a fireplace with a gilded hood. Sultan Ibrahim also built the arcaded roof around the Chamber of the Holy Mantle and the upper terrace between this room and the Baghdad kiosk. The royal architect Hasan Ağa under Sultan Murat IV constructed during 1635–36 the Yerevan Kiosk (Revan Köşkü) and in 1638–1639 the Baghdad Kiosk (Bağdat Köşkü) to celebrate the Ottoman victories at Yerevan and Baghdad. Both contain most of their original decoration, with projecting eaves, a central dome and interior with recessed cupboards and woodwork with inlaid nacre tesserae. Both are based on the classical four-iwan plan with sofas filling the rectangular bays. Yerevan Kiosk The Yerevan Kiosk (Revan Köşkü) served as a religious retreat of 40 days. It is a rather small pavilion with a central dome and three apses for sofas and textiles. The fourth wall contains the door and a fireplace. The wall facing the colonnade is set with marble, the other walls with low-cost İznik blue-and-white tiles, patterned