The River Balder Bridge is a medieval stone bridge in Durham, England, spanning the River Wear. Built in the 12th century, it is one of the oldest bridges in the UK and a significant example of medieval engineering. The bridge features five arches, with the central arch being the widest and highest, and is constructed from locally quarried sandstone. It has undergone several restorations and repairs over the centuries, including a major restoration in the 19th century. Today, the River Balder Bridge is a popular tourist attraction and a iconic symbol of Durham's rich history and heritage.