English: Water tower, Ellwood House, DeKalb, Illinois. "On the west (rear) of the Ellwood House, the circular limestone water tower is about 50 feet (15.2 m) tall and has a diameter of 18 feet (5.5 m). The tower has windows occurring at different levels, which are arched and include keystones in their design. The water tower was built in 1879, the same year as Ellwood House, and at that time the structure was topped with a wooden water tank with a conical roof. Between 1897 and 1910 the wooden tank was removed and replaced with an additional 30 courses of stone which matched the original structure. The arched door at the base of the water tower was replaced with a larger square-shaped double door. The roof remained conical and of wood construction until about 1950 when it was replaced with sheet metal."--Wikipedia.