Welcome to Keys to the Past. This site unlocks the archaeological secrets of County Durham and Northumberland by providing access to records of the archaeology and historic environment of these counties, from the smallest roman coin to the largest medieval castle, from the oldest prehistoric flint to more recent World War II pillboxes. It has been 10 years since this Heritage Lottery Funded project launched in 2003. In that time, technology has moved on and the site has recently been updated to reflect some of these changes. Archaeological contractors are advised that reports required for planning purposes will not be accepted if this website is used as the main source of information.