Observe · Regulate · Protect — since 2007. 19th OIMAP General Assembly: Singapore, 10–12 June 2026. Programme
Protection

Heritage Day

An annual event around 18 April: events in forty States, themes, how to take part and organise an event.

Updated : October 28, 2026· 3 min read

A day to look differently

Temple of Athene Nike. Venus Victrix—Wingless Victory, Dimitrios Constantin (c. 1850s–60s)
Temple of Athene Nike. Venus Victrix—Wingless Victory, Dimitrios Constantin (c. 1850s–60s)

Each year, around 18 April, the International Day for Monuments and Sites, OIMAP and its Member States organise Heritage Day: open days, visits, exhibitions, conferences, workshops. The aim is to invite everyone to discover their heritage and to understand why it must be protected.

Launched in 2017, the Day is now followed in some forty States. It brings together museums, sites, local authorities, schools, associations and market operators.

This page presents the themes, the forms of events and how to take part.

  • Day
  • Heritage
  • Events

Heritage Day in figures

40Participating States
1,800Events in 2024
620,000Visitors
2017First edition

Source: OIMAP Heritage Protection Department.

Breakdown

Visits to museums and sites36%
Workshops for young people24%
Conferences and debates20%
Exhibitions20%

Types of events.

A theme each year

Each edition has a theme: "Objects and People" (2018), "Guardians of Memory" (2021), "From Site to Museum" (2023), "Ask where it comes from" (2024). The theme serves as a common thread for events, communication materials and teaching resources.

It is chosen by a committee of Member States, after consulting civil society. It highlights one aspect of heritage protection: provenance, youth, communities, digital, restitution.

Bookplate:  Boylston Medical Library, George Girdler Smith (1806–39)
Bookplate: Boylston Medical Library, George Girdler Smith (1806–39)
Boy with Anchor, Winslow Homer (1873)
Boy with Anchor, Winslow Homer (1873)
A Lady Reading, Francis Seymour Haden (1833–1910)
A Lady Reading, Francis Seymour Haden (1833–1910)

Events for everyone

Museums organise guided visits, free evenings and presentations of restituted works. Archaeological sites open their excavation sites and restoration workshops. Schools put on exhibitions, performances, competitions.

Market operators open their salerooms and galleries, present their provenance practices and invite the public to ask questions. Customs and police services present their missions through exhibitions and presentations.

Organising an event

Any institution, association or local authority may organise an event and declare it on OIMAP's website. It receives a kit comprising the poster, the logo, suggested activities, a communication guide and a review questionnaire.

OIMAP puts organisers in touch: a museum may host facilitators from another region, a site may invite a speaker. The most innovative events receive a mention at the national ceremony.

An event that opens doors

Heritage Day succeeds first through its simplicity: one day, one theme, open doors. It reaches people who never enter a museum or a saleroom, and shows the human face of protection work.

Satisfaction surveys indicate that 82% of visitors leave with a better understanding of heritage, and 61% say they will be more attentive to the provenance of what they buy.

Forms of events

Five forms
TypeAudienceExample
Guided visitGeneral publicTour of a museum
WorkshopFamilies and young peopleSimulated excavation
ConferenceCurious publicDebate on restitution
ExhibitionAll audiencesWorks recovered
Open dayAll audiencesSaleroom

Landmarks

  1. First Day

    12 States.

  2. 30 States

    Extension.

  3. Digital Day

    Online events.

  4. 1,800 events

    Record.

Declare your event

View of the Gulf of Pozzuoli from Solfatara, Philipp Hackert (1803)
View of the Gulf of Pozzuoli from Solfatara, Philipp Hackert (1803)
St. Anthony Reading, Albrecht Dürer (1519)
St. Anthony Reading, Albrecht Dürer (1519)
Corner Cabinet, René Dubois (c. 1765–1770)
Corner Cabinet, René Dubois (c. 1765–1770)

In-person or online event

Woman Sitting Reading , Georges Lemmen (1905)

In person

On site
  • Direct contact
  • Immersion
  • Requires staff

For institutions.

Châteauvieux-sur-Suran, Antoine-Claude Ponthus-Cinier (1848)

Online

Remote
  • Large audience
  • Inexpensive
  • Less interaction

To reach further.

Taking part in the Day

  1. Choose

    Define an event.

  2. Declare

    Register on the site.

  3. Prepare

    Use the kit.

  4. Host

    Welcome the public.

  5. Report back

    Complete the review.

Ideas for activities

An organiser

High Class Students and Teachers at Bishop Cotton School, Shimla (verso), Raja Deen Dayal (c. 1882–87)
« We opened our gallery, with the provenance sheets for each work. Visitors asked questions that we had never thought of. »
Marc-Antoine Leroux, gallery owner

Vocabulary of the Day

Heritage Day
Annual awareness event.
Communication kit
Set of promotional materials.
Common thread
Guiding theme.
Review
Summary of results.

Frequently asked questions

When is the Day held?

Around 18 April.

Who can organise an event?

Any institution, association or local authority.

Is there a charge?

No.

Where can I find the kit?

On the site, after declaring the event.

Useful documents

Contacts

Egypt and Nubia, Volume I: The Great Temple of Aboo-Simble, Nubia, Louis Haghe (1846)
Egypt and Nubia, Volume I: The Great Temple of Aboo-Simble, Nubia, Louis Haghe (1846)
Heritage Protection DepartmentParis — Headquarters+33 1 00 00 03 00protection@oimap.exampleMonday to Friday, 9 am – 5 pm

See the educational resources

The birth of Rama and his brothers, from Chapter 17 of the Bala Kanda (Book of Childhood) of the Adhyatma Ramayana (Rama's Journey of the Su (c. 1820–30)

To prepare the events.

Educational resources
Image credits (16)
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