International Hydrographic Organization – European Heritage Days
For Monaco’s European Heritage Days, the International Hydrographic Organization opens its headquarters on Sunday 4 October 2026, giving visitors a rare opportunity to discover how the world’s seas are charted and how modern hydrography combines centuries of navigation knowledge with today’s digital technologies.
Discover the science behind nautical charts
The visit introduces the work of the International Hydrographic Organization and explains how specialists explore and measure the ocean environment. The programme highlights the relationship between traditional surveying methods, digital mapping, advanced marine technologies and the data used to make navigation safer and to improve understanding of the seabed.
A look beneath the surface
Visitors can learn how hydrographic knowledge is produced and shared internationally, from techniques inherited from historic navigation to contemporary tools such as digital systems and underwater technologies. The open day is designed for both adults and younger visitors and offers an accessible introduction to a field that plays an important role in maritime safety, ocean science and the sustainable use of the marine environment.
Key Details
- Date: Sunday, 4 October 2026
- Opening hours: 10:00 AM–5:00 PM
- Venue: International Hydrographic Organization
- Address: 4b Quai Antoine Ier, 98000 Monaco
- Admission: Free
Good to Know
Admission is free during the European Heritage Days programme. The official programme also provides a reservation contact for visitors who wish to organise their visit in advance. As opening conditions can be adjusted for operational reasons, checking the official event page before arrival is recommended.
