Accessibility

We want the site to be easy to read and use. Accessibility improvements are part of our ongoing work.

Using the site

Use your browser’s zoom controls to enlarge text.
Use Tab to move between links and controls, and Enter to follow a link or open an expandable section.
On the timeline, choose List to browse events without the 3D view.
Sources and references can be opened when you need them.

Checks and improvements

We have checked selected pages on desktop and phone-sized screens, including keyboard controls and expandable sources. Wider testing with assistive technology is still to be completed.

We use WCAG 2.2 Level AA as a guide for improvements and do not yet claim full conformance.

Historical images and maps

Some scanned documents and maps contain detail that is not fully transcribed in the accompanying text. If you cannot access information in an image, tell us which item you need help with.

Report a problem

Send the page address and describe what you were trying to do. If useful, include your device, browser or assistive technology. You do not need to share medical information.

Report an accessibility problem

You can also reveal our email address.