Tap any pin on the map to read its story.

Drag the year slider to see how a place changed over time.

Where one exists, switch on a historic map to see the city as it was drawn at the time.

Search the bar above for any era, person or place.

Follow the links at the end of a story to widen the view, from a single building to the empire around it.

Follow a trail to walk one theme across a city, stop by stop.