What should you know before visiting Oude Kerk?
The Oude Kerk (Old Church) is the elder of Delft's two great churches, predating the Nieuwe Kerk on the Markt by more than a century. A church has stood on this spot since 1246, and the brick tower that gives the building its character was raised in stages through the 14th century. Built on the soft, waterlogged ground of a filled-in canal, the 75-metre tower settled unevenly while it was still going up and now leans roughly two metres off vertical — earning it the affectionate Delft nicknames Oude Jan (Old Jan) and Scheve Jan (Leaning Jan). The tilt is so pronounced that the church's heaviest bell, the nine-tonne Bourdon (cast in 1570), is rung only a handful of times a year — for royal funerals and the most solemn occasions — because the vibrations threaten the leaning structure.
Inside, the Oude Kerk is a Protestant whitewashed hall whose floor is a roll-call of the Dutch Golden Age. Johannes Vermeer was buried here in 1675; his family grave lies on the north side, now marked by a simple modern slab. Nearby rests Antonie van Leeuwenhoek (1632-1723), the Delft draper who ground his own lenses, discovered bacteria and single-celled life, and is honoured with an ornate marble monument as the father of microbiology. The church also holds the grand tomb of Admiral Maarten Tromp, the naval commander killed in battle against the English in 1653, carved in marble with a relief of his final sea-fight, and the monument to Admiral Piet Hein, who captured the Spanish silver fleet in 1628. A guide who knows the Oude Kerk reads these stones as a single story — how one small canal city produced a painter of light, the discoverer of the microscopic world, and the admirals who built a maritime empire, all laid to rest beneath the same tilting tower.

