Medieval waterwheel found at Greenwich Wharf

Excavations by the Museum of London archaeologists have unearthed the foundations of the city's earliest tide-powered waterwheel at the Greenwich Wharf. The structure has been dated to the 12th century. (photos)

The base of the mill measures ten metres by twelve metres, and it was believed to have stood over 5 metres tall. Also found were a portion of the wheel as well as a channel to divert the water.