Richard Sykes (1678–1726) concentrated on the flourishing Baltic trade in pig iron and the wealth of the family was built on this in the first half of the eighteenth century.
[2] In 1751, Sir Richard Sykes demolished the previous Manor House at Sledmere, which had existed since medieval times, and built a new mansion.
He and his wife bought and enclosed huge areas of land for cultivation, built two new wings to the house, and landscaped the grounds, planting 2,500 acres (10 km2) of trees.
It is said that Sir Tatton Sykes, 5th Baronet, was too busy eating one of the milk puddings - to which he was addicted - to pay much attention, but villagers and estate workers loyally rescued pictures, statues and furniture, china and carpets, and even doors and banisters, including the house's 1780 copy of the Apollo Belvedere.
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.
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.
Sledmere House is set within a park of 960 acres (3.9 km2) designed in 1777 by Capability Brown and executed by Sir Christopher Sykes, 2nd Baronet.