High Quality Content by WIKIPEDIA articles! Thelnetham Windmill, also known as Button`s Mill is a Grade II* listedtower mill constructed of brick. The windmill is located at Thelnetham, Suffolk, England. It was built in the early nineteenth century to grind wheat into flour. Thelnetham windmill worked by wind power until 1924, latterly on two sails, after which it became derelict.