Open Monumentendag 2026

Open Monumentendag is the Dutch heritage open days weekend, when historic buildings that are normally private, closed or ticketed let the public in for nothing. The 2026 edition runs on Saturday 12 and Sunday 13 September, and it is the fortieth edition of the event.

The organisers put this year’s scale at roughly 6,000 participating monuments and around 1,250 organised activities. There is no single venue and no central programme, because the weekend is assembled locally: more than 300 committees across the country decide what opens in their own town, supported by close to 18,000 volunteers. Entry to the monuments themselves is free.

What happens over the weekend

The idea behind the event is straightforward. Buildings that stay closed to the public for most of the year open their doors for two days, and anyone can walk in. Many participating locations lay on something extra, typically an exhibition, a musical performance or a guided tour.

Coverage is broad but not total. The organisers say roughly 80 to 85 percent of Dutch municipalities join in during a given year, so most parts of the country have something within reach, though the specific buildings change from edition to edition. That churn is part of the appeal for repeat visitors: a house that opened last year may stay shut this time, and somewhere previously inaccessible may appear on the list instead.

The 2026 theme: resilient heritage

Each edition runs under a national theme, and for 2026 it is “Veerkrachtig erfgoed, in tijden van onzekerheid”, which translates as resilient heritage in times of uncertainty. It follows the wider European Heritage Days direction of “Heritage at Risk”, carried under the slogan “Revive, Resist, Reimagine”.

The organisers name a specific list of pressures on Dutch monuments: urbanisation, climate change, damage factors such as temperature swings and pests, shortages of volunteers and skilled craftspeople, financial shortfalls, and a lack of specialist expertise.

Flevoland hosts the fortieth edition

Flevoland is the host province for 2026. The symbolic handover of the key took place on 18 February 2026 at Gemaal Wortman in Lelystad, described by the organisers as the oldest building in the city.

The national opening ceremony is held on Friday 11 September in Flevoland. If you simply want to visit buildings, plan around the Saturday and Sunday.

Planning a visit

Participating monuments are listed in a searchable directory on the official website, and there is also an Open Monumentendag app. Both are the practical starting point, since opening arrangements are set per building by the local committee rather than nationally.

A few things are worth checking before you set out:

• Some monuments work with time slots to manage crowds. Where that applies, the booking details appear on that monument’s own page on the official site.
• Reservations are free and cover up to four people.
• The buildings are free to enter, but extra activities such as guided tours, workshops or lectures can carry a charge.
• Not every municipality takes part every year, and not every listed national monument opens during the weekend.

If you have a question about one specific location, the organisers direct visitors to the relevant local committee rather than the national office. Committee contact details sit on their own pages, reachable through the search function on the main site.

Meaning and history

Open Monumentendag started in 1987 and is coordinated nationally by Stichting Open Monumentendag, which has its office in Amsterdam. The current national branding is VriendenLoterij Open Monumentendag, run under the Nederland Monumentenland banner.

The Netherlands was among the first countries to sign up to the European Heritage Days, and played a part in establishing the programme in the 1990s. That programme now covers 48 countries and draws in the region of 20 million visitors each September and October, which makes the Dutch weekend one node in a continent-wide autumn ritual rather than a purely national affair.

The organisers credit the event with rallying public support for the preservation of historical monuments in the Netherlands. For anyone who has recently moved here, it is one of the easier ways to see the inside of Dutch buildings that are otherwise off limits.

Common questions

Does Open Monumentendag cost anything?

Visiting the monuments is free. Additional activities such as guided tours, workshops or lectures may have a fee, which is set locally.

Do I need to book in advance?

Usually not. Some monuments use time slots to control visitor numbers, and where that is the case the booking option is shown on that monument’s page on the official website. Booking is free and covers up to four people.

Does every town take part?

No. The organisers say around 80 to 85 percent of municipalities participate in a given year, and not every national monument in a participating municipality opens.

What is the 2026 theme?

“Veerkrachtig erfgoed, in tijden van onzekerheid”, meaning resilient heritage in times of uncertainty, tied to the European Heritage Days focus on heritage at risk.

Where do I find which buildings are open?

Through the monument directory on openmonumentendag.nl or the Open Monumentendag app, both searchable by location.