The Long Library at Sledmere, superbly restored, is one of the most beautiful rooms in England. The Drawing Room and Music Room were decorated by Joseph Rose. The Music Room contains a fine organ case designed by Samuel Green for the original house in 1751. However, there is nothing behind the facade pipes and the organ is unplayable. The Turkish Room was designed for Sir Mark Sykes, 6th Baronet, by an Armenian artist, David Ohannessian, inspired by one of the sultan's apartments in the Yeni Mosque in Istanbul. The tiles were made in Kutahya, Anatolia in 1913 in Ohannessian's workshop, the Société Ottomane de Faïence. The attached Roman Catholic chapel has a fine ceiling painted by Thomas Errington. It depicts the four winged creatures of the Evangelist in the Chancel and in the Nave, a variety of birds including a mute swan, grey heron, barn swallow and northern lapwing.