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The leaning tower

The Oude Kerk (Old Church), nicknamed Oude Jan ("Old John"), is a Gothic church in the old city center of Delft, the Netherlands. Its most recognizable feature is a 75-meter-high brick tower that leans about two meters from the vertical.

The Oude Kerk was founded as St. Bartholomew's Church in the year 1246, on the site of previous churches dating back up to two centuries earlier. The layout followed that of a traditional basilica, with a nave flanked by two smaller aisles.

The tower with its central spire and four corner turrets was added between 1325-50, and dominated the townscape for a century and a half until it was surpassed in height by the Nieuwe Kerk (New Church). It is possible that the course of the adjacent canal had to be shifted slightly to make room for the tower, leaving an unstable foundation that caused the tower to tilt.

By the end of the 14th century, expansion of the side aisles to the height of the nave transformed the building into a hall church, which was rededicated to St. Hippolytus. The church again took on a typical basilican cross-section with the construction of a higher nave between about 1425 and 1440.

The Delft town fire of 1536 and the turmoil of the Protestant Reformation brought a premature end to an ambitious expansion project led by two members of the Keldermans family of master builders. This construction phase resulted in the flat-roofed, stone-walled northern transept arm that differs markedly in style from the older parts.

The great fire, iconoclasm, weather, and the explosion of the town's gunpowder store in 1654 (see Delft Explosion) took their toll on the church and its furnishings, necessitating much repair work over the years. During one renovation, the tower turrets were rebuilt in a more vertical alignment than the leaning body below, giving the tower as a whole a slightly kinked appearance. The current stained-glass windows were crafted by the master glazier Joep Nicolas in the mid-20th century.

View from the Nieuwe Kerk tower

The church possesses three pipe organs, from the years 1857 (main organ), 1873 (north aisle) and 1770 (choir).

The most massive bell in the tower, cast in 1570 and called Trinitasklok or Bourdon, weighs nearly nine tonnes, and because of its strong and potentially damaging vibrations, is rung only on such special occasions as the burial of a Dutch royal family member in the nearby New Church. The massive bell is also sounded during disasters, when local air-raid sirens are sounded. This, however, does not happen during the siren's monthly, country-wide test, which happens every first monday of the month.

Approximately 400 people are entombed in the Oude Kerk, including the following notables:

• Elizabeth Morgan, daughter of nobleman Marnix van St. Aldegonde (1608)
• naval hero Piet Hein (1629)
• writer Jan Stalpaert van der Wiele (1630)
• naval hero Maarten Tromp (1653)
• physician/anatomist Regnier de Graaf (1673)
• painter Johannes Vermeer (1675)
• painter Hendrick Cornelisz van Vliet, who had painted the church interior (1675)
• statesman Anthonie Heinsius (1720)
• scientist Anton van Leeuwenhoek (1723)
• poet Hubert Poot (1733)

• Oude Kerk website
• View of the Oude Kerk painted by Jan van der Heyden, ca. 1660 (Web Gallery of Art)

Coordinates: 52°0′45″N, 4°21′19″E