The tower stands at the exact center of the Dutch National Grid (Rijksdriehoeksmeting), marked by a stone inside the tower.
It is known as the 'Lange Jan' to locals, sharing the name with other famous Dutch towers.
The base of the tower features a specific stone denoting it as the zero point for national coordinate measurements.
Following the 1575 explosion, the tower was separated from the main nave, which was never rebuilt.
The carillon contains bells cast by the Hemony brothers, renowned 17th-century bell founders.
The tower interior houses an original medieval crane used for hoisting materials during the 15th-century construction.
The structure displays the city's coat of arms in its masonry, referencing its medieval importance.
The Onze Lieve Vrouwetoren is a 98-meter-high late-Gothic tower in Amersfoort, functioning as the geographic center of the Netherlands according to the Dutch National Triangulation Network. Originally part of the Church of Our Lady, it survived the 1575 explosion that destroyed the main church building. It contains a carillon of 37 bells and a historical clockwork mechanism. Visitors ascend 346 steps to reach the observation deck, which offers panoramic views of the city and surrounding landscape. The structure is built from local brick and tuff stone. It remains one of the tallest medieval church towers in the country.
The view from the top gallery looking west over the historic city center rooftops.
The climb involves a narrow, winding staircase; wear sturdy, comfortable footwear.
Bring a windbreaker even in summer, as the observation deck can be significantly windier than the ground level.
Check in at the VVV Amersfoort office nearby for guided tour availability before ascending.
Attempting the climb during high-wind weather alerts, as access is restricted for safety reasons.
Guided tours are mandatory for ascent; access is typically restricted during extreme weather conditions.
Due to narrow passages and steep stairs, large backpacks are generally prohibited; dress in layers suitable for high-altitude wind exposure.
