Sir Thomas Gresham built the Osterley House mansion in the 18th century. The mansion has incredible rooms that are full of quite interesting decorations, amazing furniture, painting collection, and tapestries. Tour in this house will take you back in time two centuries ago when life was quite extravagant. Around the mansion is a great and gorgeous estate which offers many activities and leisure for visitors to enjoy, as well as the spectacular view over the entire estate.