Open Monumentendag 2026: Bezoek de Keyhof site!

Mark September 13 in your calendar. On that day, the Keyhof site will exceptionally open its doors! Since June 2025, the former Annonciaden monastery in Huldenberg, better known as ‘Keyhof’, has been owned by the municipality of Huldenberg. The perfect moment to open the site once more in its current form! Discover the rich history, the beautiful monastery chapel, and the many stories hidden within and outside the walls of the Keyhof! Free admission, reservation required. Departure times at 10:00, 11:00, 12:00, 14:00, 15:00, 16:00, and 17:00