Experts from Leicester University in England recently used the shards of a pottery drinking pot to date the building of fortifications for the town of Wallingford to the late 9th century. They believe the walls were built to protect against Viking raids.
The wall builder's drinking pot was fashioned from a particular style of pottery that contained grass fibers, allowing scientists to date its creation.
Wallingford Museum curator Judy Dewey said, “This is real evidence which will be able to accurately date the fortification of Wallingford. That is a fairly major breakthrough. We only found one kind of pottery, all of one period, which was probably broken by people building the ramparts."