I know what you’re thinking: “What about the Roman wall? Or the Temple of Mithras?” Good points, curious reader. The London Wall is older—it dates to about 200 AD—but it’s a wall, not a building. The Temple of Mithras (from 240 AD) is technically a building, but it was reconstructed in the 1950s on a different site. So it’s more of a replica than the real deal. The oldest continuously standing building? It’s All Hallows, hands down.
The White Tower, the oldest building at the Tower of London
There’s also the White Tower inside the Tower of London (built 1078). That’s a baby compared to All Hallows. Even Westminster Abbey (built 1245) is a newcomer. So yes, a humble parish church beats them all. Sometimes the quiet ones win.