Phersu Atlas
A daily Atlas of World History (3499 BCE – 2025 AD)
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Time Navigator of Human History - Interactive Atlas to navigate the whole History of Humankind

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Phersu Atlas is an interactive historical atlas from 3499 BCE to today. With the latest release, it now becomes a single, seamless atlas with clearer navigation and new thematic styles. Infoboxes link directly to events, timelines, genealogies; and expanded datasets (cities, rulers, battles) make exploration deeper and faster. The free version includes tens of thousands of polity and event timelines, plus full access to the years 1177 BC, 120, 1648, 1850, 1950, and 2015.

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Phersu Atlas was created because we wanted a way to explore world history that felt continuous, precise and alive. Historical maps were either static, fragmented or limited to narrow periods. We needed a single environment where time, space and data could finally work together. Most tools in this field stop at broad outlines. They show borders, but not how they change day by day. They show polities, but not the cities, rulers, wars, genealogies and demographic trends that define them. They show coastlines, but not how they shift across centuries. They show datasets, but not the connections between them. Phersu Atlas aims to rebuild this entire experience from the ground up. This release brings together years of work. The atlas is fully unified: global and regional views merge into one continuous map. Every element is interlinked (states, cities, rulers, battles, dynasties, timelines, statistics). The internal search engine lets you move across thousands of pages instantly. The dataset includes tens of thousands of cities, millions of demographic and territorial statistics, and detailed information on area, population and political transitions. Territorial changes are tracked day by day, across every region of the world, including coastline variations. Each change is documented and linked to at least one scientific source. Infoboxes are richer and more connected. Genealogies and ruler lists are deeper. Timelines are smoother. Everything is designed to make exploration intuitive, fast and meaningful. This is not a final version. We are already working on new ideas that push the atlas further: expanded event coverage, deeper genealogical structures, more refined statistics, new visual layers, and additional ways to navigate long-term historical change. Some of these projects are ambitious, and we believe they will interest anyone who enjoys exploring history through maps and data. If you try Phersu Atlas, we would be glad to hear your thoughts. Your feedback helps us shape the next steps of the project.

How do you handle the sheer volume of daily geopolitical changes across 3500 years without it becoming overwhelming to navigate, and is the underlying data open for verification or correction by users?

Maker

 

The data can be navigated in a map where the user can choose a specific date. To handle the large amount of data, the more the user zooms in the more detailed becomes the data (capitals and battles start appearing, cities appear etc). The UI is built to be as intuitive as possible for the users.

The users can of course propose corrections but they cannot correct the data directly via UI as this would mean adding drawings with very strict rules like no intersection between polities.

The data is based on thousands of sources, an extract of them can be found here:

Curious how you handle the data on a day to day basis. Are you pulling from a single curated source or stitching together multiple historical datasets, and what happens when sources conflict on border changes?

Maker

 The data is based on thousand of different sources that we put together, most of the times textual descriptions. To cope with conflicts we take decisions everytime that there is a conflict, but we also have a set of core rules for conflicts. Among the key rules are of course to use the most autorative source, that sources referring to smaller territories have a higher priority than rules referring to larger territories, and so on. That resulted in ca. 60000 territorial changes happened across 5500 years.