Workers have uncovered the ruins of a Saxon town beneath The National Gallery in London, revealing that the centuries-old town was much larger than previously thought.

The discovery was made during underground tunneling for ongoing redevelopment of the art museum, in celebration of its 200th anniversary. Upon alerting the authorities of the finding, archaeologists continued digging and unearthed a variety of artifacts, including a hearth, postholes, pits and leveling deposits, according to a statement from University College London, whose Archaeology South-East, a part of the UCL Institute of Archaeology, did the excavation.