Historians have put together an app that guides users to significant sites around the city, just in time for the 250th anniversary of the United States’ founding.

Throughout history, maps have been fundamental in shaping our view of the world, and our place in it. But far from being purely scientific objects, world maps are unavoidably partial and subjective, ...

His murals led to a gallery show, where he sold the hand-drawn maps on a pay-as-you-wish basis. Lines were out the door. His next cartographical challenge was London, where he used the “wiggly bends ...