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District Guide 5 minute read · 07 chapters

The Montelbaanstoren, a Leaning Tower Watching Over the Lastage

A defence tower that started sinking within years of being built, topped later with a spire whose clock rang whenever it pleased. Here is the Montelbaanstoren's odd, likeable story.

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A Watchtower for a Working Shore

The Montelbaanstoren rose in 1516 along what is now the Oudeschans, built as part of a defensive line protecting the harbour and the shipyards clustered just beyond the city's edge. Amsterdam's shipbuilding trade had spilled outside the formal walls into an area called the Lastage, and this tower was raised to keep watch over that valuable, exposed stretch of shoreline.

Its lower half is plain, practical brickwork, built for function rather than display, the kind of solid defensive tower a working port needed rather than one designed to impress visiting dignitaries. Small windows and thick walls did the job well enough that this original section has needed remarkably little intervention across five centuries.

The Lastage, Amsterdam's First Shipyard Quarter

The Lastage grew up outside the medieval walls specifically because shipbuilding was dirty, noisy and dangerous work, better kept at arm's length from the tightly packed houses of the old town. Ropewalks, mast makers and shipyards for caulking and repair clustered here through the sixteenth century, drawn partly by lighter taxes and looser building rules outside the city proper.

That arrangement did not last forever. As Amsterdam's own defences expanded to keep pace with the city's growth, the Lastage was eventually absorbed inside the walls, and its industries gradually migrated further east to the islands purpose built for the increasingly large ships of the following century.

Little of that industrial past is visible today. The quarter has long since settled into quiet residential streets and houseboat moorings, and only the name, the shape of the Oudeschans itself and the tower still standing watch over it hint at the noise, sawdust and tar that once filled this whole stretch of the city's working edge.

A Tower That Started Sinking Almost Immediately

Barely four years after construction, the tower began to lean, its foundation of packed clay and reeds unable to bear the combined weight of brick, wind and the shifting water flow between the Amstel and the IJ. Engineers of the day shored it up with poles and cables rather than starting again, and the slight tilt that resulted has remained part of the tower's character for more than four centuries since.

It stands as an early, honest reminder of just how difficult it has always been to build anything substantial on Amsterdam's soft, waterlogged ground, a challenge the city's engineers have faced again and again through every century of its growth.

A Spire That Changed Its Character Completely

In 1606, the plain defensive tower gained an entirely new personality when architect Hendrick de Keyser, the same figure behind several of the city's grandest church towers, added an ornate wooden spire on top. The addition transformed a purely functional structure into one of the more graceful silhouettes on the old harbour skyline, a combination of stern brick base and delicate crown that still photographs beautifully at dusk.

That contrast between the tower's two halves, one built to survive an attack and the other built purely to please the eye, sums up rather neatly how Amsterdam's priorities shifted once its defensive walls stopped needing to work quite so hard.

Malle Jaap and His Unpredictable Bells

A clock was added soon after the spire, giving the surrounding neighbourhood a way to tell the time for the first time, and its bells quickly earned the affectionate nickname Malle Jaap, roughly Crazy Jack, for their habit of ringing at moments with no obvious connection to the actual hour. A minute hand was not added to the mechanism until 1890, which may explain a good deal of the earlier confusion.

Amsterdammers have kept the nickname alive for generations, a small, humanising detail that makes a four hundred year old watchtower feel oddly companionable rather than simply monumental, the kind of local joke that outlives whichever generation first found it funny.

In brief

  • The tower was built in 1516 to guard the harbour and the Lastage shipyards outside the old walls.
  • Its ornate spire, added in 1606, was designed by Hendrick de Keyser.
  • The nickname Malle Jaap refers to the clock's long history of chiming at unpredictable moments.

A Favourite Subject of Rembrandt's

The tower's odd, top heavy silhouette caught the eye of at least one very famous local. Rembrandt drew the Montelbaanstoren more than once from across the water, reed pen sketches now kept at his old house nearby, each one capturing the tower's stocky brick base with real affection.

In at least one of those drawings, he left the ornamental spire out entirely, sketching only the older, sturdier shape beneath it, as if he preferred the tower's original, more honest silhouette to the decorative crown added after his own lifetime began. It is a small, telling detail from an artist who spent his career looking closely at exactly this kind of ordinary civic architecture.

A Quiet Stop Along the Oudeschans

The Oudeschans today is one of the calmer waterways in Amsterdam Centrum, lined with houseboats and warehouse conversions that have largely replaced the industry the tower once guarded. It sits close enough to the busier lanes to reach easily, yet far enough from them to feel like a genuine change of pace.

Tiffany photographs the district's quieter corners as a matter of habit and has more than a few frames of this exact stretch of water, and Vanessa cycles this side of the canal ring often enough to know exactly where the light falls best in the evening. An overnight booking that opens with a slow walk along here tends to carry that same calm straight through to the following morning, and the rates page explains how longer evenings like this one are arranged.

Short answers

Why does the Montelbaanstoren lean?

Its original foundation could not properly support the tower's weight, and it began sinking unevenly within a few years of being built in 1516, a tilt that engineers stabilised rather than corrected.

What was the Lastage?

It was Amsterdam's shipbuilding quarter, deliberately kept outside the medieval walls because of the fire risk and mess that ropewalks and shipyards produced, until later city expansion absorbed the area.

What does Malle Jaap mean?

It is the affectionate local nickname for the tower's clock and bells, which for centuries rang at unpredictable times rather than reliably marking the hour.

Further reading

Keep walking more lanes of the district guide, picked to follow this one.

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