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. During its construction the foundations were not strong enough to support the building, and the church began to lean. As work continued, the builders tried to compensate for its lean on each layer of the tower, but to this day only the four turrets at the top are [|truly vertical]. 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 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 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.
Furnishings
The church possesses three pipe organs, from the years 1857, 1873 and 1770. 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.
Graves
Approximately 400 people are entombed in the Oude Kerk, including the following notables:
