A date may be approximate.
“Circa” means approximately. Check the article for how a date is established and how much uncertainty remains.
Chrono Atlas
History has a place.
Choose a year. Explore a place. Follow a story. See the wider world around the moments that interest you.
Reading the atlas
A place.
A moment.
A bigger story.
A marker gives you somewhere to look. A year gives you a frame. The story brings you closer to the people, choices and evidence behind them.
Coordinates become context when you look closer.
What a view tells you
A marker anchors a story.
It places an article in the landscape. The pin is a starting point, not the full extent of a site.
A year frames your view.
The selected year sets the atlas view. A story’s date may be an estimate or a period rather than one exact year.
A boundary adds a layer.
Historical boundaries give geographic context. Check their reference date and sources before treating them as a precise snapshot.
Ways to investigate
Choose a question.
Give the map a purpose.
An exploration prompt
Keep the place.
Change the moment.
3,000BCE · View A
and2,500BCE · View B
- Choose a region, then open Compare years.
- Select two moments and look at the boundaries and stories shown.
- Follow a difference into an article or check the layer’s sources.
A difference may reflect historical change, different source material or a gap in coverage. The map helps you notice; the evidence helps you explain.
A thread to follow · The First Cities
The city is only
half the story.
Look beyond the walls. This Story Path explores the records, water and distant connections that helped early city life work.
- 01
How does a city come to life?
Begin in Uruk, where materials, skilled work and shared arrangements came together.
- 02
How do you keep track of what is owed?
Follow the practical records that helped turn counting into writing.
- 03
Who keeps the water moving?
Step into the fields and canals, where cooperation could become a dispute.
- 04
Why reach so far from home?
Explore the materials and people that connected distant places.
Keep the context in view
A clear map.
A complicated past.
The atlas makes history easier to navigate. These four distinctions help you read it without making the past simpler than it was.
A boundary is a representation.
Historical borders can be uncertain or simplified. A clean line does not guarantee a precise historical edge.
An empty view is not an empty past.
Markers reflect Before Now’s growing collection. Missing entries describe its coverage, not a lack of history.
Proximity does not prove influence.
Events can be near each other in time or space without being connected. Follow the sources behind the story.
When you need a little help
A few practical answers.
The main controls stay in the atlas. Here is where to look when something is unclear.
Where can I check the map’s sources?
Open Sources & accuracy within the atlas for information about the displayed map. Use each article’s sources for the claims made in that story.
What should I try if there are no markers?
Change the year, widen the view or choose a different Story Path. The selected view may simply fall outside the collection’s current coverage.
Can I explore without selecting pins?
Turn on Article list to browse titles. With the map focused, use the arrow keys to move and + / − to zoom. Hold Ctrl / ⌘ while scrolling to zoom.
Can the atlas take me on a tour?
Yes. Time travel advances through years; Story tour opens articles in sequence. Set the pace in the tour controls, then start your chosen tour.